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Seiko 21D

 
Seiko 21D |

Seiko 21D

Description

This is a nice ladies’ watch form caliber of a good quality from Japan. It uses a large Glucycur balance with two legs, a Diashock shock protection system and the anchor wheel runs in a chaton with an unidentified shock protection with an omega-shaped spring.

Technical data

Manufacturer:Seiko
Caliber:21D
Size:6 3/4 x 8'''
A/h:19800
Number of jewels:17
Escapement:Pallet lever
Balance types:Glucydur anular balance
Shock protection(s):Diashock (Seiko)
Balance bearing / direction hairspring:Counterclockwise
Moveable stud:yes
Adjust mechanism:Hairspring key
Construction:
  • lever
  • escape wheel, seconds wheel, third wheel, center minute wheel
  • mainspring barrel
References:Flume: (K3 -)
Hint: The jewel count, the types of balances used, and the shock protections employed refer only to the specimens held in the archive and are therefore not relevant for the precise identification of the movement.

Usage gallery

Seiko 21D: Seiko ladies' watch

Seiko ladies' watch

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