Seiko SRPD81 Boat Master Mod


A custom Seiko SRPD81 Boat Master Mod – if you like a black watch with a blue twist this might be the one for you.

Both the crystal and bezel insert feature increased scratch resistance materials.

This watch will stand up to most thing life can throw at you, in the city, the wilderness or at sea.

Like it, but it needs a little tweak? Please get in touch.





The Seiko SRPD81 Boat Master Mod has an upgrade to the crystal, insert and strap.This watch does it all on its own.The vibrant blue lume is a fabulous contrast to the stealth; black, black and some more black


Double dome sapphire crystal with blue anti-reflective coating.
Sloped ceramic bezel insert.
Black rubber two piece strap.


Calibre: 4R36
Movement Type: Automatic with manual winding
Power reserve: Approx. 41 hours
Jewels: 24
  • Stop seconds hand function
  • Day/Date display


Case Material: Stainless steel
Case Size: Thickness:16.05mm, Diameter:42.5mm , Lug-to-lug:46.0mm
Crystal Sapphire Double Dome
Band Material: Rubber
Distance between lugs: 22

Other Details

Water Resistance: 10 bar
  • Unidirectional rotating bezel
  • See-through & Screw case back

Seiko SRPD81 Boat Master Mod

All Seiko Mods come complete with original box, packaging and paperwork, tags etc. All watches have a serial number so it can be identified and serviced by Seiko in the future if you wish. All watches sold on the website come with a 24 month warranty for the movement and 12 months water resistance supplied by WellingTime.

All base model Seiko watches and modified parts are in stock. Delivery will be made within 7-10 days for UK customers and 3 weeks for customers from abroad. You will be informed your order has been received and given an expected delivery date. After your watch has been modified you will have your delivery date confirmed along with a Royal Mail or DHL tracking number.

Additional information

Weight 700 g


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