Seiko Cal. 0721 - 428

Seiko 0721-428

The 0721-428 is a sought-after Solar piece from Seiko's golden era. It features a Navy dial protected by a Hardlex crystal and offers 170m of water resistance. [seikata-wm-92a47197df68]

Also known as: Baby Tuna, Arnie

Specifications

Movement
Solar
Case Material
Hardlex-Coated Steel
Case Width
43mm
Case Thickness
14.7mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Bidirectional
Water Resistance
170m
Dial Color
Navy
Jewels
23j
Frequency
36,000 bph
Power Reserve
50 hours
Year
1970

Related Models

seikata-wm-92a47197df68