I am no expert on dive watches but.....
A GMT bezel on a dive watch.....hmmmm...something is amiss. A frankenwatch perhaps?
Plenty out there,
Modified Seiko ,actually only the movement is Seiko ,made to look like vintage,you can find also the milsub design and basically all vintage Rolex designs
txs for the replies
I suspected that it was a combination of more than one model, lol M