This came in shortly before Christmas and I bought it on a whim for under $70. I can’t say I had the time to do much in the way of due diligence and for the money decided to have a punt. I’m confident that, given what I’ve paid, it hasn’t recently been frankened and the patination (including the signed dial) is sufficiently even that I’m fairly certain all parts of the watch belong together. Trench watches were one of my first areas of interest when this illness struck over 10 years ago and, if this does come from the house of Messrs Perret & Berthoud then it will feel like things have come full circle. The first and significant demerit is that I can't find a dial typeface in Sala to match. There are other Universal Watch according to Mikrolisk and it's perfectly possible the watch comes from one of the other makers (though perhaps not the Lahore-based company) Statistically it's perhaps more likely that it comes from a precursor of UG but that doesn't prove a thing. The serial number, when viewed under a loupe, looks more like 101555 rather than 131555. Given our known serial number ranges for UG this could work in terms of sequence. I've tried to research some case numbers for other early watches but wasn't able to come up with much. The silver hallmarks suggest that the case was made before 1933 as the Swiss silver standard went down from 935 to 925, bringing it in line with sterling silver. Clearly this adds up in terms of the watch's style. The bear hallmark and absence of any UK stamp suggests it wasn't made for the English market but no real surprise there (it came from a North African seller). I'm assuming that JF is the name of a case maker - there's a list of Poinçon de Maître on David Boettcher's excellent website: https://www.vintagewatchstraps.com/swisspdm.php The emphasis is on gold case makers so not 100% helpful - the only listed name to match JF is Junod Frères. There is also some excellent information about Swiss hallmarks: https://www.vintagewatchstraps.com/swisshallmarks.php It will go off for a service at some point in the new year and that will entail a new crystal and probably a relume of the hands. I have a new 12mm leather strap with a sterling silver buckle from David Boettcher ready to be fitted when it returns. Any other thoughts on this one?