• Tired of adverts on RWI? - Subscribe by clicking HERE and PMing Trailboss for instructions and they will magically go away!

Zenith cal.400 Service

Nikz19

Watchmaker / Modder
Vendor (Probationary)
Certified
24/4/18
1,962
3,172
113
Italy
My favorite movement hands down, as nice as challenging as a service.
Here is the all time classic Zenith Cal. 400, known as first automatic chronograph, which gives it its name, “El Primero”.
Given its extremely high beat @ 36.000BPH, lubrication is crucial on this one, doesn’t leave the slightest room for error.
Some pics of it, disassembling first (it was full of oil, where it shouldn’t be any) and totally disassembled and inspected, ready to be reassembled.
juLWp5.jpg
juLmAt.jpg
juLaFF.jpg
juLUap.jpg
juLo82.jpg
juLqvE.jpg
juLYY3.jpg
juLOzn.jpg
juLyks.jpg
juL1VY.jpg
juLniD.jpg
juL6pk.jpg
juL8Go.jpg
 
Last edited: