Seiko Cal. 3820 - 306

The 3820-306 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 3820 caliber with 21j jewels beating at 36,000 bph, it delivers a 41 hours power reserve. [seikata-wm-db27940ae819]

Also known as: Tuna, World Timer

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

10.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Black

Jewels

21j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1982

Related Models

• Seiko 0726-516
• Seiko 7134-789
• Seiko 4587-324
• Seiko 0769-183
• Seiko 7144-240
• Seiko 0743-424
• Seiko 5621-951
• Seiko 6137-640
• Seiko 4454-506
• Seiko 7086-736
• Seiko 7057-227
• Seiko 4541-149