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Discussion Starter · #1 · (Edited)
Project : a list of Zenith ‘model codes’ (introduced ca. 1972) and the movements behind them

The first two numbers denote the material of the case and the strap or bracelet.
For instance : 01 xxxx xxx or 20 xxxx xxx :
01 is the code for a steel watch. 20 is the code for a goldplated watch.

The last three numbers denote the movement. This thread focuses on those movement codes.

Notes :

- these codes could also be listed with a dot after the second number, e.g. 290 = 29.0.

- movements from other manufacturers (such as ETA movements) were modified by Zenith.

- this is a list of movements used in the 1970’s. Movements for ladies’ watches (though less important) are included.


Looking forward to corrections, additions, suggestions !



061 = ESA/FHF 976.001

075 = ESA/FHF 935.112

100 = 101 (UG microtor with date)

113 = 2541

115 = ESA-ETA 955.401

116 = ESA-ETA 955.111

118 = ESA-ETA 955.291

125 = 2562

141 = 5011 K

146 = ESA-ETA 956.412

148 = 5011K with additional moonphase

150 = 1110

154 = (hw)

157 = (hw)

165 = Omega 1100 (movement code - see 228A!)

172 = 2310 / 2320 (Marvin 515)

180 = (hw)

202 = 136 HC (or 136 HCTL) with calendar, moonphase

203 = 146 HP

205 = ESA-ETA 555.xxx

207 = ESA-ETA 555.415

208 = ESA-ETA 555.419

210 = AS 5100

216 = AS 5103

225 = ESA-ETA 955.xxx

226 = ESA-ETA 955.112

228A = Omega 1100 (reference number code on case back - see 165!)

230 = ETA/Unitas 6497

231 = ETA/Unitas 6498

267 = ESA-ETA 956.xxx

274 = 2562 C

290 = 2562 PC

305 = Omega 625

337 = ESA-ETA 955.114

345 = ETA 2832 (36000 bph)

346 = ETA 2837 (36000 bph, bilingual calendar)

352 = 1730

355 = 1740

365 = 2572 C

360 = 2572

380 = 2572 PC[/FONT][/COLOR]

382 = variant of cal. 2572 PC, with Kif Trior shockproofing. Zenith marked this as '2572 PC E' and movement code 382 (instead of 380)

388 = 2572 C minus seconds indication

390 = 1733

392 = ESA.ETA 255.481

393 = ESA.ETA 255.483

400, 410, 420 etc = cal 400, 410, 420 etc (After 1986)

405 = Movado 405

408 = Movado 408

415 = cal. 3019 PHC

416 = cal. 3019 PHC

425 = ESA.ETA 954.11x

434 = cal. 3019 PHC

418 = cal. 3019 PHF

437 = cal. 3019 PHF

450 = ETA 2850

453 = ETA 2852

456 = ETA 2872

460 = ESA 9361 (quartz stepper motor)

462 = ETA 2892-2

471 = 47.1 (Zenith Time Command, quartz - version with asymmetric button arrangement)

473 = 47.3 (Zenith Time Command, quartz - version with symmetric button arrangement)

485 = ETA 2671

489 = ETA 2671

490 = ETA 2892

490 = quartz

495 = ETA 940.111 (quartz)

500 = ESA 9162 (tuning fork)

505 = ESA 9164 ? (tuning fork)

510 = ESA 9180 (quartz stepper motor)

515 = ESA 9181 (quartz stepper motor)

535 = hw extra thin

545 = ESA-ETA 959.001

738 = hw

940 = ESA-ETA 205.911 Autoquartz
 

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The 100 in the reference is the Cal. 10.1 (or 101), which is a microrotor calibre by Universal Geneve. Picture of one in Rössler (p. 186).

Hartmut Richter
 

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Discussion Starter · #5 ·
Thank you Hans & Hartmut ! I've included your additions in the list.
Nice to see that the 2541 and 2542 are present.
And wouldn't it be nice to have a Zenith 101 (with UG microtor) in the collection ! (never seen any of those)
 

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As Dr. Roland Ranfft once pointed out on the vintage forum, microrotors are nearly the same as flattened ladies' movements! You save height without really extending the width of the movement by making everything as small as it would roughly be in a ladies' calibre and repositioning it. Of course, you end up with the same problems as when designing a ladies' movement and have to take according measures (ball bearings on rotor, minimise friction, etc.). Still, a very interesting concept and definitely not a total dud, since they have been and are being copied even these days by some of the finest makes (e.g. Patek Philippe Cal. 240).

Hartmut Richter
 

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Discussion Starter · #9 · (Edited)

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Discussion Starter · #12 ·

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I got fed up with having to search for this thread repeatedly so I decided to add a sticky! I know it's incomplete but it's the best we've got! Thanks to sempervivens for starting it all off.

Hartmut Richter
 

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I am a new member who collects vintage Zenith and Universal watches.


I have a very nice h/w 2542 in a rose-gold finished case with the case code being 592. This is a super watch and very accurate. Perhaps these details can be added to the thread?


Having bought recently a 2572C watch in a case with the last three numbers '365', I now want to replace that case and crown with others in better condition (some of the gold finish has flaked off and it is a little battered with a few deep scratches; the crown is worn down to unusable condition). Can anyone please point me toward a possible source as nothing decent comes up on the most obvious auction site. (The movement and dial etc on this watch are ln 95% + condition, whereas the ss back is in good condition, so just the main body would satisfy my need). I believe that there are other cases which should accommodate this movement and such a gold finish case may well be acceptable.

If you can help I will be very grateful. Many thanks.
 

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Welcome to the Zenith forum. Thanks for the info on the "Cal. 365" (previously only marked down as "HW with date"). I'll edit the original post.

As for the Cal. 2542, that should be too early for the new numbering system. Would it be possible to post some pictures? That would help to confirm it.

Hartmut Richter
 

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Thank you Hartmund for your welcome. I attach a quick scan of my watches but will post another in the not too distant future when my Zenith 2572C is returned from a full strip and lube.

In the attached picture the UG Golden Shadow is a marriage watch. It originally was powered by a 42 calibre movement. I bought a very mint 66 micro rotor move,went and dial. marrying the two required the rear cover to be machined (removal of most of the movement ring and some reduction of thickness. [The case is gold-filled, not solid gold....so it is not a Golden Shadow, more a Gilt Shadow.

The UG 263 qppeqrs to be a military model in civilian guise; it has a very good dial and keeps good time. It has just had a new setting lever fitted (lucky tho find that in the UK!. It is a nice watch which keeps good time. The Polerouter has been strip cleaned and works well, keeping very good time. The Zenith 2542 is the larger watch with rose gold finish. The two SS watches are a 2532PC and a 2572PC. The Zeniths were reset about a week ago and are remarkably regular as a group. [IWe are very lucky to have an excellent Watchmaker about 10 miles away....Omega factory trained in the 1960s.]
 

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A great resource, very commendable Sempervivens.
 

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what would this code designate? 01/02 0100 940? i saw this on the back of a sporto case. it's a steel case (01) with 02 being stainless maybe? but what about the movement code - 940? zenith never had a movement with that code, correct?
 
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