Jump to content

ETA Part Number System?


Hoe

Recommended Posts

Hi there

A rookie question:

I am working on the two vintage ETA movements 2783 and 2873 and will need spare parts for the automatic winding assemblies. While searching for these parts I came across obviously different ones which have the same part number.

Furthermore, some ETA parts are interchangeable between ETA movements.

How do I determine which part number I really need, how does ETA’s part number system work?

So far I am going for photos rather than numbers when looking for parts on Ebay.

Best wishes

ETA_part_system.jpg

Link to comment
Share on other sites

a problem with this particular numbering system is that the numbers represent a part. Such as a stem is referred to part number 401. But part 401 without the movement number could refer to literally hundreds of different stems. So it's kind of a two-part system the number as opposed to the word stem bike 401 and then the movement number. Otherwise ordering a 401 all by itself it isn't going to fit.

helpful when looking for parts is the third link where you can see the differences of the watches you're looking for they appear to be in the same family. Then the first in the second plank are the parts. If you click on the part number in each of the listings it give you the cross reference the parts.

 

http://cgi.julesborel.com/cgi-bin/matcgi2?ref=ETA_2773

http://cgi.julesborel.com/cgi-bin/matcgi2?ref=ETA_2783

http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&ETA_2783

  • Like 1
  • Thanks 1
Link to comment
Share on other sites

To get which parts are interchangeble between the different caliber would be a mamuth book.
So insted one can buy access to an database provided by BestFit.
Here you can see the actual part number and which calibers share this part.

Access to the database is sold by Esslinger
https://www.esslinger.com/matsys-online-from-bestfit-lifetime-membership-watch-parts-lookup-software/

This is the Caliber Search
BestFit1.thumb.jpg.3024af0ece6ba21ad30c1d5f98917ac6.jpg

And the Interchangable list
BestFit2.thumb.jpg.dfbbb6879aaeb07b694ef63119b76cdc.jpg

 

Link to comment
Share on other sites

13 minutes ago, Nucejoe said:

Dose this database or any other, also provide tech specification for parts, like CGS for HS? 

No unfortunately not, to get the CGS numbers one still have to meassure the hairspring or use a bunch of old lists.

  • Thanks 1
Link to comment
Share on other sites



  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • This is not rare at all, the dial code and case code don't usually match.
    • Good question!! Anyone know of a substitute movement??!! 🤔🙏
    • Interesting issue that I just noticed: this Seiko 5actus Watch from 1977 has a calibre listing on the dial of 7019-8030R but on the case back it says 7019-8010!! Like a mis-printed coin, is this watch therefore worth a lot of money for its rarity?? 🤪😲🤔🤪
    • I wish that was the case. The Aegler movements used in the early days by Wilsdorf & Davis (for brands like Rolex and Rolco) came in several sizes and without designated calibre numbers that survive.  They become a bit easier to identify during the 1920s. Below is an Aegler-Rebberg, 25.74mm in diameter. It’s from a woman’s Rolex wristwatch. Stamped Rebberg and 500 on the dial plate (but it isn’t a Rebberg 500, it’s the wrong size).  I’d be interested if anyone can identify the movement.  It is based off the Aegler Nr.1, circa 1903, but they based many many calibres of different sizes on it. The closest I have to a positive ID is the  ‘Rolex Nr.50’ circa 1917, but no dial side images or movement sizes are available in the references. There are identical looking movements in many sizes.  The 25.74mm of this movement is a particularly strange size for the era, it equates to 11.41 lignes.      Best Regards, Mark
    • It looks like this movement comes with a number of different shock settings. Emmywatch shows that it comes in versions with no shock settings, 'Incabloc', 'shock resist', and 'Supershock'. Perhaps the different settings position the impulse jewel/roller table in a non-ideal position relative to the pallet fork/guard pin. Are you able to check under high magnification if the pallet fork and roller table are able to operate without any interference? Just for fun I took a look and I have one FHF 70 in my collection, a West End Secundus with a non-shock protected FHF70. I had a note with the watch that said, "Movement is stamped 'FHF 70', but the FHF70 looks to have sub-seconds instead of center seconds movement (??)" but that a google search turned up both types for this movement. EDIT: I just took a look in my parts drawer and I have a few of these movements, both in center seconds and sweep seconds, but they all are non-shock protected.  
×
×
  • Create New...