Seiko Cal. 0770 - 817

The 0770-817 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 0770 caliber with 28j jewels beating at 36,000 bph, it delivers a 39 hours power reserve. [seikata-wm-31a0d1c46b49]

Also known as: Sumo, UFO

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

37mm

Case Thickness

11.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Silver

Jewels

28j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1965

Related Models

• Seiko 6283-709
• Seiko 4429-455
• Seiko 6145-508
• Seiko 5258-120
• Seiko 0788-517
• Seiko 6290-689
• Seiko 4530-714
• Seiko 6615-848
• Seiko 0712-496
• Seiko 6285-139
• Seiko 6262-271
• Seiko 7056-435