Most visitors online was 1990 , on 7 Feb 2022
Yes, both of these are JUFs and can clearly be seen by the logo at the bottom of the plate. Compare the three screws on the two JUFs with the crystal regulator...you should be able to see in the dogleg in the pattern on the crystal regulator. That's what distinguishes the three clocks.Both of these are JUF and have the same back plates as the crystal regulator.
If it's truly a family heirloom or commemorating something like the first annual Rose Bowl game, I can live with an inscription....It's very special to have an inscription which significantly helps to date such an old clock. Very nice!
Given the Catholic connection, "Prosis" from Latin seems most appropriate and a loose translation of "For Service".The german "Prost" (equivalent to "cheers" when lifting the glass) is an abreviation of the latin "prosit" which is 3rd pers sing. conjunctive present active and could be translated as "it should help,it should be good for something..."Although I live in a region where lower german dialects are frequently spoken I´ve never heard of "Prosis" as on the clock , it still makes no sense to me.
Macaw, this is a particularly interesting clock being it is (a) made by Andreas Huber as Kurt has mentioned, and (b) that it can be accurately dated by reason of the inscription. My estimate is that it was made no earlier than late 1901 and most likely in first or second quarter 1902, thus confirming the date inscription. It does have Plate 1471, which I refer to as Plate 1471H being made by Huber (as seen in the photo posted by Kurt). The otherwise identical plate made by JUF has the click layout in the exact same pattern as the two later clocks you have posted, which I refer to as Plate 1471J. The Huber version was first made in early 1900 snd used until about February 1904 when Patent 144688 was granted to Huber for their twin-loop temperature compensating disc pendulum.