One of the best is the Noob 111N, I believe, with a sandwich dial. The GMT functions on some of the PAM reps work. The 297 and the 089, et al, have a GMT function with a 24 hour hand that is settable with the crown. The 320 GMT, in the gen form, has a GMT hand that moves with the hour hand. It makes one circuit of the dial in 12 hours where the 297 and 089 make a circuit in 24 hours. The rep factories have not performed this 12 hour GMT function, as yet. As a result the rep 320 GMT hand makes a circuit in 24 hours rather than the gen-like 12 hours.