Seiko Prospex 1968 Diver Modern Re-interpretation SPB439 vs Seiko Prospex 1965 Diver Re-creation SPB143

Side-by-side at a glance. Click a watch above to open the full reference page.

	Seiko SPB439J1	Seiko SPB143J1
Model	Prospex 1968 Diver Modern Re-interpretation SPB439	Prospex 1965 Diver Re-creation SPB143
Caliber	Seiko Cal. 6R55 -- in-house automatic, 21,600bph, 70h PR, 30j; bidirectional winding, hand-wind and hacking; GMT complication	Seiko Cal. 6R35 -- in-house automatic, 28,800bph, 70h PR, 24j; hackable, manual-wind; upgraded from 6R15; used widely in Presage and Prospex lines
Case size	42.7mm	40.5mm
Lug-to-lug	48mm	46mm
Years produced	2023–present	2020–present
Brand tier	enthusiast	enthusiast
Era	modern	modern
Movement tier	Unclassified movement	Unclassified movement
Market median (excellent / full-set)	n/a	n/a
Typical range	n/a	n/a
Confidence	low	low
Categories	dive, sport	dive, sport
Editorial	n/a	yes