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

	Seiko SRPE93K1	Seiko SPB143J1
Model	Prospex Turtle Save the Ocean SRPE93	Prospex 1965 Diver Re-creation SPB143
Caliber	Seiko Cal. 4R36 -- in-house automatic, 21,600bph, 41h PR, 24j; hackable, manually windable; used in Seiko 5 Sports and entry Prospex models	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	45mm	40.5mm
Lug-to-lug	50mm	46mm
Years produced	2020–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	yes	yes
Typical price (2026)	$300 – $450	n/a

Seiko Prospex Turtle Save the Ocean SRPE93 vs Seiko Prospex 1965 Diver Re-creation SPB143