Ref. SRPF81K1
Collection: ProspexMovement: 4R35
The Seiko Prospex, reference SRPF81K1, has a steel case and a blue dial. The self-winding movement is calibre 4R35. Its jewel count is 23. Hardlex is the crystal material. A rubber strap is the band. The case is water resistant to 200 metres.
Add to my inventory
Free account required - pre-fills all specs automatically
Last updated 24 Oct 2026Suggest a correction
TECHNICAL SPECIFICATIONS
CASE
Case Material
Steel
Water Resistance
200m
Crystal
Mineral Glass
MOVEMENT
Movement Type
Automatic
Caliber
4R35
Power Reserve
41h
Frequency
21,600 vph (3 Hz)
Jewels
23 jewels
DIAL
Dial Color
Blue
BRACELET/STRAP
Bracelet/Strap
Rubber
More from Seiko
Other watches with the 4R35 calibre
Seiko
Prospex Sea
HBB001
AutomaticSteel
Seiko
Prospex Diver Scuba
HBB001J
AutomaticSteel
Seiko
Prospex
HBB001K1
AutomaticSteel
Seiko
Prospex Sea
HBB003
AutomaticSteel
Seiko
Prospex Sea
HBB004
AutomaticSteel
Seiko
Presage Cocktail Time
HCB001J
AutomaticSteel
Seiko
Presage Cocktail Time
HCB001J1
AutomaticSteel
Seiko
Presage Cocktail Time
HCB002J
AutomaticSteel
FOR WATCH DEALERS
Trading the Seiko Prospex?
Clone any catalog watch into your stock, sync it to Chrono24 and eBay, and invoice it with your own tax settings.