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11.5''', Dm= 25.6mm, Do= 26.0mm
f = 18000 A/h
Balance staff U2503
Mainspring / battery
Zf1012, 1.40 x 7.5 x 0.07 x 280mm
1.25 x 0.70 x 0.25mm
Comments about the data
jewel-bearing rotor if 23 jewels
detached manual wind
differences not known between 542, 547, 549
535: sub second
536: sweep second
537: sweep second *)
538: power reserve display, sub second
539: power reserve display, sweep second
540: power reserve display, sweep second *)
541: sub second
542, 547, 549: sweep second
543: sweep second *)
544: power reserve display, sub second
545: power reserve display, sweep second
546: power reserve display, sweep second *)
suffix A: for strongly domed dial
*) Many catalogs mention here a direct sweep second instead of an indirect. But the investigated 546A has definitely an indirect sweep second.
Example, year: signature; shock device
1962: old data sheet
Not for Sale!
The movements presented in this caliber finder are not for sale. This is only a data sheet for identification and evaluation of the movement calibre, as well as for approximate dating.
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