Seiko Cal. 6646 - 720

The 6646-720 is a sought-after Solar piece from Seiko's golden era. It features a White dial protected by a Mineral crystal and offers 90m of water resistance. [seikata-wm-6fa47f4546ab]

Also known as: Samurai, Emperor

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

43mm

Case Thickness

9.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

White

Jewels

20j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1968

Related Models

• Seiko 4487-128
• Seiko 5212-895
• Seiko 6350-734
• Seiko 6272-696
• Seiko 6125-739
• Seiko 4428-590
• Seiko 7135-425
• Seiko 3841-450
• Seiko 5689-895
• Seiko 4571-283
• Seiko 6286-835
• Seiko 0769-560