Seiko Cal. 6637 - 793

Seiko 6637-793

Released in 1998, the Cal. 6637 with design code 793 was part of Seiko's domestic market collection. Powered by the 6637 caliber with 20j jewels beating at 28,800 bph, it delivers a 48 hours power reserve. [seikata-wm-3da707bd4888]

Also known as: Tuna, UFO

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
42mm
Case Thickness
10.8mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
200m
Dial Color
Silver
Jewels
20j
Frequency
28,800 bph
Power Reserve
48 hours
Year
1998

Related Models

seikata-wm-3da707bd4888