Comments:
Inaugural year of production of watch models:
Quick reference... feel free to add to the list, (chiefly timeless models still in production and famous models no longer in production)
[the next level of depth would be to list initial calibers and all subsequent caliber iterations for each model, of course with year of caliber change]
Rolex:
Oyster Perpetual 1931
Explorer 1953
Submariner 1953
GMT-Master 1955
Day-Date 1956
Milgauss 1956
Cosmograph Daytona 1963
SeaDweller 1967
Omega:
Seamaster 1948
Constellation 1952
Speedmaster 1957
JLC:
Reverso 1931
Memovox 1950
Geophysic 1958
Audemars Piguet:
Royal Oak 1972
Royal Oak Offshore 1992
Patek:
Perpetual Calendar 1941 (regular production)
Nautilus 1976
Aquanaut 1997 (1996 precursor)
Cartier:
Tank 1917
More now and more to come
BREGUET : Type 20 (XX) 1954
PANERAI : 5218’s Luminor 1993
HEUER : Monaco 1969
ZENITH : Chronomaster 1995
SEIKO : Turtle 1976
JEAGER-LECOULTRE : AMVOX2 2006
VACHERON CONSTANTIN : 1921
GIRARD-PERREGUAUX : Laureato (from 1967) EVO3 2003
LANGE UND SÖHNE : Lange 1 1994
You are missing out!
Their LUC line is worth a look, same with the Alpine Eagle. The modern cases are a bit large for my taste but they fit in with current fashions.
I believe Omega's DeVille line has been in continuous production . . .
. . . since 1960.
Art