My Eastern Watch Collection: Seiko Prospex 200m Diver SRP637 (or SRP637K or SRP637K1) Shrouded Black Monster (a.k.a. Monster Tuna) - A modern transformation of the original Monster to something bigger and stylish,
Seiko Prospex SRP637K1 Day Date Stainless Steel Divers 200M Automatic Mens Watch - Japan Pre-owned Vintage
Herculodge: First Look: Seiko SRP637 Shrouded Black Monster