Seiko Cal. 6337 - 640

The Seiko 6337-640 represents an important milestone in Seiko's 1971 lineup. Powered by the 6337 caliber with 31j jewels beating at 28,800 bph, it delivers a 37 hours power reserve. [seikata-wm-c9db15bb2b11]

Also known as: Pogue

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

11.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Navy

Jewels

31j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1971

Related Models

• Seiko 6270-895
• Seiko 6148-758
• Seiko 7196-736
• Seiko 6123-570
• Seiko 0758-223
• Seiko 7076-882
• Seiko 4472-693
• Seiko 4458-235
• Seiko 4447-481
• Seiko 6641-112
• Seiko 3869-215
• Seiko 4417-848