The SRPG18K1 features the Seiko calibre 4R35 that is both manual as well as a self winding automatic movement with a normal operating accuracy tolerance of +45 / -35 seconds per day and a power reserve of 41 hours. The watch has a 42.4mm rose gold tone stainless steel case with thickness of 11.7mm, a brown leather strap with luminescent hands and indexes and Sapphire crystal. Water resistance rating is 200m and additional features include a rotating bezel, screw lock crown, screw case back and a date display.
I've had my eye on this for a while and will be my second Tortoise. It's 42.4mm but wears a lot smaller
nice!