1970 Bestfit guide vintage Electric Electronic Watches watchmakers repairs

The original 1970 Bestfit guide to early electric and electronic watch movements, supplied as a 24-page PDF on USB.

⭐ At a glance

📏 24 pages of exploded diagrams, parts drawings and part numbers

✅ Covers electric/electronic movements from 19+ brands, including Omega, Seiko, Hamilton, Citizen and Tissot

📦 Supplied on USB memory stick, PDF format

✔️ New with tags

Specifications

• Brand: Unbranded
• Type: Repair information
• Format: USB stick, PDF (24 pages)
• Compatible Brands: Benrus, Certina, Citizen, Croton, Cyma, Doxa, Elgin, Eterna, Gruen, Hamilton, Junghans, Mido, Movado, Omega, Seiko, Tissot, Waltham, Wittnauer, Wyler, Zodiac
• Condition: New with tags

🔧 What it does & how to use

Bestfit catalogues are the industry-standard reference watchmakers use for ordering parts and checking interchangeability. Two general catalogues were published in the 1950s and 60s; this dedicated volume was produced in the 1970s specifically to cover the new electric and electronic movements of the era. It includes exploded movement diagrams, parts identification drawings showing both the factory part number and the Bestfit reference number, and interchangeability information across calibres and brands.

• Find the movement: Identify the calibre marked on the movement or case back of the watch you're working on.
• Locate the diagram: Look up that calibre in the guide to find its exploded parts diagram.
• Cross-reference numbers: Match the factory part number against the Bestfit number for ordering.
• Check interchangeability: Use the cross-reference data to find compatible parts across other calibres and brands.

Movements covered include:

Benrus – GN13, HB13, HS19, HR1
Certina – 29152, 29251, 29252, 29351, 28351, 28352, 778
Citizen – 8520A, 8600A, 8610A, 8620A, 8630A, 8640A, 8650A, 8810B, 8811B, 8821B, 9002A, 9010A, 9011A, 9012A, 9021, 9030A, 9040
Croton – Bpec, Dnesa, Xt71, Xt72
Cyma – prefix 96
Doxa – prefix 96
Elgin – 250, 260
ESA – 9150, 9154, 9157, 9158, 9162, 9164, 9180, 9181, 9182, 9183, 9190, 9200, 9210, 9135, 937.681, 9360, 9361, 9362, 9370, 9380
Eterna – 1550, 1551, 1555, 1556
GP – 59, 350, 351, 352
Gruen – 30SS, 80, 92E, 150CA, 160CA, 508CA, 509CD, 1000SS, 1001CA
Hamilton – 645, 683, 700, 701, 702, 703, 682
Junghans – 600.00, 600.10, 600.12
Lip – R50
Mido – 755, 756, 1207
Movado – 500, 505, 510, 515
MST – 915, 916
Omega – 1220, 1230, 1250, 1255, 1260, 1300, 1301, 1302, 1310, 1320, 1325, 1510, 1600, 1601
PUW – 1000, 1001, 1002, 2001, 2510, 2502, 2508, 2509, 3000
Sears – A01A, A02A
Seiko – 0702A, 0703A, 0723A, 0903A, 3302A, 3303A, 3702A, 3703B, 3819A, 3823A, 3863A, 4633A
Tissot – 430, 431, 2010, 2040
Waltham – B339, H315, H400, H477, V340, V418, V497
Wittnauer – 11WT, 12WT, D13T, 68T
Wyler – WQ80, WQ81
Zodiac – 91, 93, 94, 111, 848

⚠️ Please check the movement calibre list above to confirm your specific electric or electronic movement is included before buying, as the guide only covers the calibres listed.