Seiko Cal. 4536 - 903

The Seiko 4536-903 represents an important milestone in Seiko's 1972 lineup. It features a Navy dial protected by a Mineral crystal and offers 100m of water resistance. [seikata-wm-a7830c674a9e]

Also known as: Sumo, World Timer

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

12.4mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Navy

Jewels

17j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1972

Related Models

• Seiko 6295-717
• Seiko 7049-436
• Seiko 4519-581
• Seiko 7029-413
• Seiko 4584-359
• Seiko 6339-758
• Seiko 0743-935
• Seiko 6357-628
• Seiko 6159-769
• Seiko 7193-333
• Seiko 6216-746
• Seiko 6613-819