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Unitas 531

 
Unitas 531 |

Unitas 531

Description

A nicely decorated swiss lever movement is the Unitas caliber 531 (or probably another one from the caliber series Unitas 530). As you can see, it is a very old form movement, one of the first ladies’ anchor form movements.

Unitas 531: Unitas 531: Dial side

Unitas 531: Dial side

Technical data

Manufacturer:Unitas
Caliber:531
Size:5 1/4'''
A/h:18000
Number of jewels:15
Escapement:Pallet lever
Balance types:Nickel anular balance
Shock protection(s):none
Balance bearing / direction hairspring:Counterclockwise
Moveable stud:no
Adjust mechanism:Hairspring key
Construction:
  • lever
  • escape wheel, seconds wheel, third wheel, center minute wheel
  • mainspring barrel
Winding mechanism:yoke winding system
Setting lever spring:3 holes
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

Unitas 531: Fako Watch ladies' watch

Fako Watch ladies' watch

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