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Shanghai ZSE Z-A


Shanghai ZSE Z-AShanghai ZSE Z-A


The chinese ZSE Z-A was the first incarnation of the "First National Standard Movement", the first standardized mens' watch movement. It was made between 1972 and 1974, before it was superseded by the million-seller ZSH series.

The construction is very traditional and easy serviceable - the large four-leg ring balance contains a thick and rugged (hard to break accidentially) hairspring, which is connected to a moveable hairspring stud and whose effective length can be regulated directly on the hairspring key. The balance beats with 21600 A/h and is shock proctected. The shock protection system is made in China and its springs were available in many different shapes, starting from an Incabloc-like type to a "four leaf clover".

Shanghai ZSE Z-A dial sideShanghai ZSE Z-A dial side

On the dial side, you see, whan was above described as "four leaf clover": The shock protection spring. It reminds a bit of a KIF flector. Otherwise, there are no surprises on the dial, and of course, this movement uses a yoke winding system.



 Technical data

CaliberZSE Z-A
Number of jewels17
EscapementAnchor with pallets
Shock protection(s)China (different types)
Balance cock directioncounterclockwise
Hairspring studmoveable
Regulator typeHairspring key
Movement constructionFork
Escapement wheel, Fourth wheel, Third wheel
Center wheel
Mainspring barrel
Winding mechanismyoke
Setting lever spring3 holes
FunctionsHour, minute, second
Beats per hour21600
Size111/4''' (measured: 25,4 mm)
Image in Flume Werksucher -
Shanghai ZSE Z-AShanghaiShanghaiZSE Z-A11 1/4''''''Shanghai ZSE Z-A17 Jewels, 11 1/4'''''', 21600 A/h, SCD






This movement was kindly donated by Klaus Brunnemer. Thank you very much!