Waltham watch co. jewelers advertisement correct time chronometer

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This is the first thing I added to the collection this virus thing had my game off like a lot of us. Was doing a eBay search for something else and this popped up had to have it. Jewelers and watchmakers use have these in store front windows and glass cabinets were they had watch for sell so customers to set there watches. Remember in the old days of eBay when stuff was cheap a lot of cool stuff like this showed up. You don't see this stuff now saw it and had to have it. Think it will clean up nice. Has a eight day 15 jewel wind indicator movement with wiplash regulator. I guess after I get it service down the road I can set my watch by it like people did years ago when this was in a store window in the 1930's.
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You wind it and set the time on the bottom. Seller photo's
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Here is my US Navy issued deck chronometer from WW1 similar dial same movement except one has roman numbers. The wind setup different on the two.
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Found this info in the book Military timepieces by Whitney did not think that would be in that book on page 394.
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