henryrover,
Your collection already covers most needs.
Well done before 40 years mark!
If there was one gap, you may need a extra flat dress watch for the three times a year that any self-confident gentleman must dress up right.
This is just one example from the L.U.C XP Urushi series but they also come without Japanese lacquer dial.

L.U.C XP Urushi Year of the Horse

L.U.C XP Urushi Year of the Horse

L.U.C XP Urushi Year of the Horse
Regards,
MTF