Two points. First, there is no gold value in a capped, filled or plated case of any age, much less this age. It’s a question of appearance and your taste. A jeweller's polishing cloth will make a significant improvement in the appearance of the case.
The attraction of these watches, particularly in the condition of this one, is that the dauphin hands and dial have an old fashioned 'wealth' appearance and the case has that lovely chunky feel, and wears bigger for it.
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Second, if you have it serviced, whether or not you choose to get a new crystal, you watchmaker can give the dial and hands the gentlest dusting.
This watch looks neglected, you can tell that from the decrepit old watch strap. The seller has made no effort to improve the watch's appearance. Generally, that’s a good thing because there is always a risk of a botch job!
So, it should look a lot better after some TLC.
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