IWC with case but no ref number

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studeb

·Sep 28, 2024

Hi,

I have an IWC with serial number on case and movement, but no ref number stamped.

Is it possible to determine the ref number without looking through age appropriate catalogs?

Thanks!

P.S. I have applied for membership at the IWC forums, but acceptance is pending.

 

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gatorcpa

·Sep 28, 2024·ΩF InvestiGator

Pictures always helps. Someone might have something similar.
gatorcpa

 

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studeb

·Sep 28, 2024

Sure!
Cal 89, SN 2.21M

 

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Tony C.

·Sep 28, 2024·Ωf Jury member

Inner case back photo?

 

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studeb

·Sep 28, 2024

I do not have an outer photo.

 

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Tony C.

·Sep 28, 2024·Ωf Jury member

Looks Ok.

Likely no ref. #, though there were always internal numbers.

 

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studeb

·Sep 28, 2024

Thanks, trying to source a correct crystal, was thinking a ref no would help.

 

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Tony C.

·Sep 28, 2024·Ωf Jury member

Do you have a watchmaker who will be replacing it, or do you plan to do it yourself?

 

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studeb

·Sep 28, 2024

Much as I would like to DIY, don’t have the tools. So my watchmaker would be doing it.

 

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Dan S

·Sep 28, 2024

Most watchmakers have a selection of crystals on hand to install. If not, they can measure it accurately and order a replacement. I doubt your watchmaker wants you to attempt to provide a crystal.

Edited: Sep 28, 2024

 

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gatorcpa

·Sep 28, 2024·ΩF InvestiGator

From looking at the case, especially the lugs, this looks like a Ref. 1410.


https://antique-watchlife.com/31773.html

However, the movement would be a cal. 402, not a cal. 89. Similar, but not the same.

Hope this helps,
gatorcpa