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Every few months brings new refinements. There is nothing written on the ratchet wheel 2. If you want to really get into the details of that data derivation then dig in! Download a version of the table movement serial number table. Another wrench spanner for you Brits in the toolbox is always welcomed as Gruen collectors need all the help they can get. One was developed by Jack Wood, the other Barry Cooper. Both are top-notch Gruen historians and researchers.

Let's say you have a Waltham watch with serial number 21, as shown in the photo below. Note that we're using the serial number from the watch movement, not from the watch case. Looking at the table of Waltham serial numbers see example belowyou can see that number 20, was made in and 21, was made in marked in red in the table below. Since your serial number falls between those two numbers, you know that your watch was made in or Cases and watches were often made by different companies and each usually has its own serial number.

You usually have to take the back off the watch case to see the movement serial number which may appear anywhere on the watch movement.

Use the movement serial number. Do NOT use the case serial number! This is an example only.

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Your movement serial number may not be in exactly the same location as the one in the photo, but you are looking for the serial number that is on the watch mechanism itself This is an example using the Waltham serial number table.

Figure 2 - The Style Date Table.

Vintage Gruen Precision Solid 14K Gold Bumper Automatic Mens Watch 17J +$ shipping. - Vintage Gruen Precision Solid 14K Gold Bumper Automatic Mens Watch 17J VINTAGE ART DECO GRUEN AUTOMATIC MEN'S WATCH SWISS. +$ shipping. - VINTAGE ART DECO GRUEN AUTOMATIC MEN'S WATCH SWISS. Vintage Gruen . Dec 8, - Explore mike_barnett's board "Gruen Watches" on Pinterest. See more ideas about Gruen watches, Watches and Watch model pins. Click "Dating a Gruen Wristwatch from a Wadsworth Case Serial Number" to download a copy of the article. For this particular dating technique, two criteria must be met. 1 - The case must be manufactured by Wadsworth 2 - The case serial number must start with .

We cross-checked our dates utilizing all watch dating methods available to us. The cross-checking was limited to a subset of watches for which the additional methods were valid.

60 Seconds with a Vintage Gruen Precision 452SS (17 Jewels Hand Wind)

One such method was provided by Gruen historian Jack Wood, an active Gruen Forum member, contributor, and Gruen researcher. His dating method, currently "in press", is based on the serial numbers of cases manufactured by the Wadsworth Case Company. He found that for wristwatches that used Wadsworth manufactured cases, the date a specific watch was manufactured is tied directly to the serial number of its case.

Another verification method utilizes the movement's serial number. This too is a relatively new technique, and is limited to theand caliber families.

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A full description of dating via movement serial numbers can be found on the website GruenWristwatches. Both of these techniques, using Wadsworth case serial numbers and movement serial numbers, pinpoint a watch to its specific date of manufacture, but are also approximations.

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For years in which no watches could be identified, we relied on watch crystal catalogs. These catalogs show the highest Style Number in use for the year the catalog was published. Seventeen crystal catalogs were utilized in this project including those from the GS, Rocket, and Perfit companies. There are anomalies to the Style Number dating method! We identified several anomalies but undoubtedly there are others that savvy Gruen collectors will find and share with the community.

We found some Style Numbers were paired with different movement calibers, but the watch model remained the same. We called this a model " movement migration ". Over time Gruen changed the movements in a watch model.

37 rows  This page contains INSTRUCTIONS for using the serial number look-up tables that . Featuring stylish and functional displays, these Gruen watches are the perfect additions to your wardrobe. Digital wristwatches generally have backlighting, which helps you read the time in poor lighting conditions. With numerous features, you can pick one that suits your lifestyle. Popular Face Shapes for Gruen Men's Wristwatches: Octagonal ; Oval. New Gruen wristwatch dating method for watches from - My research pal Barry and I have spent many months devising a way to date Gruen watch models using the information stamped in the back of the watch's case.

They maintained the correct labeling in the case by changing the caliber number while leaving the Style Number the same. The "Submarine" model shown in figures 4 and 5 is a good example of this migration from one movement to another.

Some Submarine models have the identification indicating a caliber movement is utilized while others marked with indicate a caliber Figure 4 - Gruen "Submarine" model.

Figure 5 - Submarine watch model "migration" shown in the case back.

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The first column lists each Style; the numbers to the right are the movement calibers that are used for that Style. Again, looking at the Submarine model we see that it has a Style Number of In the Style Caliber Table, calibers and are shown to the right of Style If a watch's Style Number indicate a date that is prior to the date the movement itself was introduced, then clearly that style number has been used previously.

Take for example the Style Number Figure 6 shows six different calibers of movements that used that number. One such movement is the caliber that began production in The Style Number of indicates the year of introduction for the watch wasbut this clearly cannot be the case for watches with caliber movements. In approximately the Style Numbers broke the barrier.

Dating vintage gruen watches

While we show 1, as the end Style Number for the yearthe Style Numbers stamped in the cases will not be a 4-digit number. Much like a 3-digit odometer, the number rolls over and started over again as a 3 digit number padded with zeros on the front end.

For example, the Style Number we reference as 1, will have a case that is stamped with a Style Number of That particular watch is stamped withor The Style Caliber Table proved to be a distraction while we were doing our research because there is such a wealth of data that can be mined from it. For example, the lifespan of a movement can be approximated by finding the lowest and highest Style Numbers associated with that movement caliber.

To do this the caliber to investigate is chosen, its lowest and highest Style Numbers are found in the Style Caliber table and these Style Numbers are then looked up in the Style Date table to determine the dates of the lowest and highest Styles.

Gruen watches are notoriously difficult to date. No accurate date/serial number records exist for Gruen watches. Gruen collectors often rely on old advertisements or watch material catalogs to determine when a particular model may have been introduced, but this doesn't establish a date for a particular watch. Gruen watches were designed and made first by Dietrich Gruen, a German watchmaker who came to the United States in , and later by his son Fred. Early Gruen watches included pocket watches and wristwatches for men and women. Gruen watches were known for their elegant and thin design, marketed by the company as VeriThin. Vintage Gruen Watches. Related Categories. Auction Alerts. Common as they are today, wristwatches are a relatively new entry into the world of timepieces. In fact, as recently as the early decades of the 20th century, men considered wristwatches too effeminate, instead favoring traditional pocket watches. While a variety of factors helped shift.

You'll find that it is the lady's movements that have the longest lifespan as well as having more Style Numbers than the men's watches. We hope that our contribution will help Gruen collectors learn more about their watches and perhaps motivate them to help piece together other missing parts in the Gruen puzzle.

Our work provides the date of initial production which is the first step in solving the many mysteries that await those that are curious enough to seek more information. Be careful though, that curiosity found in some Gruen collectors turn collectors into obsessed researchers.

A special thank you is owed to Bruce Shawkey for his riveting introduction outlining the history of Gruen research and encouragement. And to Jack Wood, a hard-working Gruen researcher and historian that has consistently given much to the Gruen community.

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We were able to use his recent work to help validate our findings. And the ever-growing GruenWristwatches. Style Number. Date your Gruen using Style Numbers, described in the article below. So, here it is, the latest and greatest table: This table replaces the "Figure 2" in the article.

Vintage Gruen Watches

Revolutionary New Gruen Dating Technique. In the past 5 years the number of tools to help us learn about these awesome watches has jumped from a single page Caliber-Date table to at least 3 new, significant dating tools.

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It's important to understand the difference between the dates that these tools provide. You want to match the date with the correct use of that date.

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Here are the 3 different dates that can be found on a Gruen watch. Style Number Date - This page you are now reading, and the online dating tools found here, all tell you the Style Number Date. This date is an approximation of when the model of watch first went into production.

It does not tell us when your specific watch was made.

Gruen Style Numbers that are found in cases of vintage Gruen watches can be used to date Gruen watches accurately. This Style Number Dating Technique is described in detail. The page is a peer reviewed and published paper in the NAWCC and the AWCI horological journals.

Use this date to help find the correct model name of your watch. A tutorial on how to do this can be found here. Out of all the dates you can find on a watch, this is the date that determines exactly how old your watch is. It's is also the most bullet-proof of the dating techniques. The tables have been shown to be very accurate, and unlike Style Number Dating, there are no caveats or tricky situations.

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Read more about Case Manufacture Dates here. I believe it's the least trustworthy of the tools. The reason it's an "iffy" kind of tool is that movements can be, and often have been, swapped out of the watch and a different movement installed.

Even if the movement is the exact same caliber as the original movement, it can have a manufacture date that differ by as much as 10 years. I use this date as a verification date. When possible, collect all 3 of these dates and use them together to get the most accurate picture of your watch's age.

In addition to learning about individual watches, the Style Numbers can teach us a lot about Gruen's use of movements in watches.

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