Seiko Cal. 7121 - 748

The 7121-748 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 7121 caliber with 17j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-be9a47c9a70a]

Also known as: Arnie

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

13.2mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

90m

Dial Color

Silver

Jewels

17j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1970

Related Models

• Seiko 5645-484
• Seiko 7164-676
• Seiko 7181-766
• Seiko 6239-428
• Seiko 6613-174
• Seiko 6367-517
• Seiko 6216-736
• Seiko 5612-472
• Seiko 5249-626
• Seiko 7146-212
• Seiko 3863-435
• Seiko 5699-924