Seiko Cal. 6638 - 366

Released in 1989, the Cal. 6638 with design code 366 was part of Seiko's domestic market collection. It features a Green dial protected by a Mineral crystal and offers 70m of water resistance. [seikata-wm-ba88066c65da]

Also known as: Emperor, Arnie

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

38mm

Case Thickness

13.5mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

70m

Dial Color

Green

Jewels

17j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1989

Related Models

• Seiko 4495-184
• Seiko 6188-266
• Seiko 3831-313
• Seiko 4567-461
• Seiko 6663-808
• Seiko 6368-416
• Seiko 6369-652
• Seiko 4584-771
• Seiko 6112-920
• Seiko 6166-495
• Seiko 6113-576
• Seiko 5676-822