Shanghai SB1

 
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Shanghai SB1

Description

The 11 12 ligne windup movement Shanghai SB1 belongs is a rare to find chinese windup movement, in contrast to the ubiquitous movements of the ZSE/ZSH series.

Current movements like the R16-1 base on that construction, which is easy to see on the gear train and on the base plate.

base plate

base plate

The speciality of this movement is, that it has got a modern gear train with second wheel and dial-side indirectly driven hands. Since no center minute wheel is used, the height of the movement is reduced, and the available space for the mainspring barrel and the balance wheel is increased almost till the center of the movement.

gear train

gear train

The gear train is state of the (swiss) art: Mainspring barrel, second wheel with slip clutch, third wheel, directly driven center seconds wheel and escape wheel.

All bearings, except for the mainspring barrel and for the center seconds arbour on the dial side are equipped with synthetic rubies.

side view of the gear train

side view of the gear train

The thin, four-leg anular balance is beared in two chinese shock protections, which strongly remind of a swiss Incabloc shock protection. The balance regulares a classical swiss-type pallet lever movement.

Shanghai SB1: Dial side

Shanghai SB1: Dial side

Of course, this movement has got a yoke winding system on the dial side.

Technical data

Manufacturer:Shanghai
Caliber:SB1
Number of jewels:17
Escapement:Pallet lever
Balance types: Nickel anular balance
Shock protection(s): China (different types)
Balance bearing / direction hairspring:Counterclockwise
Moveable stud:yes
Adjust mechanism:Hairspring key
Construction:
  • lever
  • escape wheel, seconds wheel, third wheel, large driving wheel
  • mainspring barrel
Construction type:solid construction
Winding mechanism:yoke winding system
Setting lever spring:2 hole(s)
Features:SCD
Functions:hour, minute, second
Size:11 1/2''' (measured: 25,6mm)
Inventory number:19001

Usage gallery

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