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Discussion Starter · #1 ·
Hi,

A jeweler friend of mine called to say he had a watch that I might be interested in.

All in all, a rather attractive Principe alarm watch in perfect working condition. Gold-plated case with really great patina. Case is marked Plaque G10 and a hallmark I cannot figure out. Crowns showing a bit of wear.

Looking for any reference I can get for determining if this is worth even offering on or selling here on the forum.

It's a little small for my wrist though wearable.

Thanks!



2018-4-10 17-25-4.jpg 2018-4-10 17-24-42.jpg 2018-4-10 17-25-51.jpg
 

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Little-known mid-tier brand. Good condition.

- You can get some history on the brand using mikrolisk.de.

- if you open it up you can research the movement using Dr. Ranfft's archive.

- Valuation would best be done using eBay (SOLD items using Advanced Search) using comps that are gold-plated alarm watches of similar sizes from lesser-known brands.
 

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Zenith Forum Co-moderator
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Nice! Looks as if it's in good condition, the movement (though generic) is one of the rarer ones of its type and has the added perk of the alarm indication (on/off) - nothing to complain about, really. Just make sure you see a movement picture to tell that that's also clean enough and you can check whether it's in fully working order.

Hartmut Richter
 

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Discussion Starter · #4 ·
Thanks to all for the insights.

I opened the case and the 230 is in excellent condition.

Any guesses on the case hallmark would be great. Finally was able to get the focus right.


Sent from my SM-G570M using Tapatalk
 

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Vint. Forum Co-Moderator
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The ‘hallmark’ is in fact the responsibility mark. This is like the hammer head marks on gold and certifies that the claimed level of plating is correct.

It is required any time there are marks showing the precious metal coating.

Apparently the precious metals control office in Berne has a public register of 12,000 of them but given a registration only lasts for 20 years I don’t know of any online resources.
 
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