Not a 'wristie' but a 14K 'double back' Waltham '92'...
Decorated '1892' series movement with gold jewel settings...
This is a low production pendant set 1892 type movement and the cases were special made for this movement. Afaik there were not many movements like this made as most were lever set. Besides having pendant set and only one case screw where most have two, it is 16 size and the majority of 1892 models were 18size. The guy who c/o the watch last month said it is a strange bird, and he has been working on PWs for 50+ years. When he c/o it about 10 years ago he said it was the second one he could remember working on. Yesterday, he said it was still only the second one after thousands of PW jobs. The other one was in a 14K yellow gold filled case.
Chances are this watch was sold with the movement already cased (probably sometime in the late 1890s) because of the odd ball movement. Back then, jewelers sold most high grade pocket watches in two pieces...the movement, and the case. Back before there was so much watch trading and case/movement swaps, you saw many top grade RR Approved movements in cheap chrome plated cases etc. because the owner wanted RR accuracy but did not care much about the case or could not afford a high $$ case. The case and porcelain (applied over brass) dial are slightly oversize for a 16 size movement as can be seen in the pic with the backs open. It was made back then for a 'Gentleman' who wanted a 'Big Gold Watch'.
Inside the case back it has 'Assayed 14K' = solid 14K gold.
'Pendant set' = winds and sets by the crown. Many RR etc. pocket watches were 'lever set' and had a small lever under the bezel that had to be pulled out to set the time. The bezels had to be unscrewed and removed every time the watch was set. This was the rule with most later RR Approved PWs so the time could not be altered by mistake.
The case, both case backs, bezel, crown, and pendant (bow) are all 14K gold. The case is in 90% condition and the hinges are like new and tight. The crystal is glass.
The 'Gentlemen' owners took very good care of it throughout the years.
Although not a 'Gentleman' of any sort, I've owned it 14 years and also take good care of it.
The Model 92 Story - Waltham Watch Company's Model 1892