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11.5''', Dm= 25.6mm, Do= 26.0mm
f = 21600 A/h
power reserve 55h
Balance staff MST 7535
Mainspring / battery
1.30 x 10.5 x 0.112 x 340mm
Zf873, 1.30 x 10.0 x 0.11 x 320mm
1.50 x 0.90 x 0.25mm
Comments about the data
last MST designed family
Except the calendar discs all parts are usable for each family member.
hacking by stopping the 4th wheel, not as common the balance.
indirectly driven minute allows a big balance and low profile
option: excenter device mounted on regulator (Fig.5)
rotor with bayonet joint (1/4 turn of the "screw head" to release or lock the rotor)
attention: right handed crown-wheel screw
520: manual wind
521: manual, date
522: auto, date
523: auto, day, date
suffix -1: minor modifications
Example, year: signature; shock device
1-2) ca. 1975: 43, Roamer Watch Co, Swiss, Roamer, 17 Jewels; Incabloc
3-5) ca. 1975: Roamer Watch Co, Swiss, Roamer, 17 Jewels; Incabloc
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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