Hello, PoyFr,
you were asking for the wrist watches in your original post - I would have to look through a lot of books, but I'm pretty sure there are plenty of digital display
ww's even at the time when wrist watches started to be "en vogue" - let's say somehwere beginning 1900's.
"Of
course I had to be French to raise this question, as it is retained
that it is the esteemed French watch-maker Blondeau (1830) who made for
the king the first and one only 'Jump Hour'. Then, Joseph Pallweber
(with Cortebert Comapny, French again) mass produced Jump Hour watches
(pocket) in 1880"
I'm not sure about your sources, and what exactly means "the first" in that context (probably the first to the french king ??
) - but there are many jumping hours dating earlier. Just as an example, there is a nice pocket watch by Paul Lullin, London (MIH, La CdF) - jumping hours ("a guichet") and wandering minutes display very much/similar like "modern" Urwerk or AP's Starwheel - made at the beginning of 18th century (so 17xx). That should be at least 100 years before Blondeau. BTW, Breguet's repeating watches typically also had a jumping hour (hand, of course). If the question would be more about the general principle of displaying digitally - and without asking for ww's specifically - I'm pretty sure you could go back some more decades (if not centuries).
BTW, Joseph Pallweber was from Salzburg, Austria, If I'm not mistaken and "Cortebert" was a swiss company located in the swiss village Cortebert.
Best regards
Suitbert