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Technical Manuals and Data Sheets

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Useful Websites for Technical Manuals

Need a tech manual for a vintage chronograph?  The entire Ensembl-o-graf series of books is available for free here.


Elgin parts list and cross reference.   This will allow you to type in the grade of your Elgin pocket watch, and show you all the part numbers for the various parts.  You can also type in a part number and get a list of all grades using that part number. 

Technical Guides and Manuals : A. Schild, Citizen, ETA, ISA, LeCoultre, Omega, Rolex, Seiko, many others. Just type in the caliber number you’re looking for in the search field, click “search” then on the next page, click the tab “document matches” underneath the search field. or click here to search by manufacturer (this is nowhere near as fast)

More technical manuals and guides : Included are Bulova, Universal, Rolex, Longines, Omega, Valjoux, among others.

Seiko or Seiko, Citizen , Orient Technical Guides and Manuals other misc manuals

ETA Swiss Lab: click on the “x” , then click “skip”, then “welcome” then “training center” then “eta swiss lab”.

ETA Technical info- no need to login just click on “Technical Documents” at the top of the screen, then search for your movement caliber:

Miyota technical documents- free pdf downloads.

Omega information (free registration may be required)- Type in your case number for information about your vintage Omega.

Ranfft’s Watches- great for identifying movements, Search by caliber or you can also search by 3 letter code on balance bridge. Color pictures, dimensions, power reserve

NAWCC Chapter 149 has some excellent free technical manuals and books (free books in pdf format) on their pages.  Click here to see their titles.

TM 9-1575- WWII military watch repair manual.

Watch Manufacturer's Contact List

Individual Technical Manuals

Accutron 214 Service Manual                                                                                              

Accutron 218 Service Manual

Swiss Tuning Fork Manuals (Omega 1250, 1255, 1260, Also Longines, Baume & Mercier, IWC, Etc.)

Elgin 1915 Master Catalog includes nearly every original Elgin part number from before 1915.

Hamilton 500 ElectricRepair and service or click hereor here Bulova Interchangeable Parts Catalog, Revised Edition, 1971

Hamilton 505 Electric Repair and service (505 info starts on book page 167) or click here or here

Lecoultre Futurematic (thank you Mike Murray)

A Schild Tech Sheets

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