Except for those specifically marked as "replikafliegers", all of the major brands made changes to the original Luftwaffe-issue B-Uhr; if for whatever reason you feel the need to LARP as Erich Hartmann with a dinner plate on your wrist over your bomber jacket, Laco is your best bet.
Stowa>Original Laco but the Laco "Pro" or "Custom" get pretty close, if you actually want straight lugs and a diamond crown, I don't like the fake patina on the Laco Pro's but Dekla seems to have a nice balance without shoving dirt into the lume
White Tie/Black Tie: technically not supposed to wear a watch, period, but a dress watch like a JLC or Tank is OK (unless you have a Seamaster 300M...with a garrote in the crown...)
Business Formal: Dress Watch, really anything on leather
Business Casual: Bracelets are good to go, so divers, explorer, chronographs, plus anything above
Smart Casual: Sport Watches are actually preferred
Relaxed Casual: whatever you want