Seiko Cal. 5639 - 366

The 5639-366 is a sought-after Spring Drive piece from Seiko's golden era. It features a White dial protected by a Sapphire crystal and offers 180m of water resistance. [seikata-wm-8fd3c01c9889]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

10.9mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

White

Jewels

23j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1974

Related Models

• Seiko 4548-618
• Seiko 5231-107
• Seiko 7127-529
• Seiko 0781-134
• Seiko 4511-794
• Seiko 6160-163
• Seiko 6283-321
• Seiko 7087-507
• Seiko 6275-321
• Seiko 6275-382
• Seiko 0794-604
• Seiko 6129-707