Seiko SRP637 baby tuna aka monster tuna

Seiko SRP637 baby tuna aka monster tuna
€380.00

Offered for sale is the watch from the title – a legendary Seiko diver known under several nicknames. This is a discontinued model, no longer in production, making this a great opportunity for collectors and Seiko enthusiasts.

Condition:
The watch is in excellent overall condition.

  • Crystal, bezel, bezel insert, and case show no visible signs of wear

  • Bracelet has only very minor marks (no scratches)

  • One small hairline mark on the caseback

  • Bezel clicks firmly and precisely

  • Crown operates smoothly

  • Lume is strong and bright

Set includes:

  • Watch with full-length original bracelet

  • Original box and papers from 2015 (full set)

Wearability:
The case measures 47 mm, but this refers to the outer tuna-style shroud.

  • Bezel diameter: approx. 41 mm

  • Lug-to-lug: approx. 50 mm

Thanks to this design, the watch wears much smaller than the raw case size suggests and is comfortable even on smaller wrists.

Technical specifications:

  • Brand: Seiko

  • Movement: Seiko 4R36 automatic (hacking & hand-winding)

  • Case material: Stainless steel with protective shroud

  • Crystal: Hardlex

  • Bezel: Unidirectional rotating bezel

  • Water resistance: 200 meters / 20 bar

  • Dial: Luminous markers and hands

  • Bracelet: Stainless steel, full length

A true “screaming Seiko” design – from the iconic tuna-style case to the fonts, markers, hands, and bezel. A proper Seiko diver with strong character.
Numerous reviews are available online and on YouTube.