5219 - 39mm Hobnail bezel with a larger movement
5297 - 349mm replacement to 5296
5168A - 42.2mm Aquanaut steel with black dial
5711/1A-012 - gradient black-to-blue dial
5800/1A-010 - 42.2mm Nautilus steel on steel with blue dial
*These are guesses as to the direction of the brand. The numbers are within an approximate range of 1-to-9999.;-)
-Dean