 | Ranfft Watches | Pink Pages for Timepieces |
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| Index | Timepiece Archive, Categories | Archive: Watch Movements | Timepiece Market |
 Fig. 1  Fig. 2  Fig. 3 | MST 521 Features manual wind sweep second date: quickset hack feature Data 11.5''', Dm= 25.6mm, Do= 26.0mm H= 3.9mm F= 1.25mm T= 2.2mm 17 jewels f = 21600 A/h power reserve 56h Balance staff MST 7535 Mainspring / battery 1.30 x 10.5 x 0.112 x 340mm replacement: Zf873, 1.30 x 10.0 x 0.11 x 320mm Hands 1.50 x 0.90 x 0.25mm Comments about the data | Remarks 1973-1976 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.3) attention: right handed crown-wheel screw family/generations: 520: manual wind 521: manual, date 522: auto, date 523: auto, day, date suffix -1: minor modifications Example, year: signature; shock device ca. 1975: 43, Roamer Watch Co, Swiss, 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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