I know you mentioned the 321; so maybe consider the 233. Check out the 233 dot version. Classic modern panerai GMT. I can go on and on about the 233; but I have in so many previous posts LOL. Good luck. I like 89 for the the 24 hour style GMT; but the 12 hour GMT style is executed perfectly in the 233 with home/dot function. Also there is pm/am feature if you want newer 233 version. Also there is auto version 270 but I forget the newer version of the 270 since they discontinued.