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 Fig. 1  Fig. 2 | Alpina 1720 (Moeris 19'''B) Features stem wind and set sub second Data 19''', Dm= 42.5mm, Do= 43.1mm H= 5.25mm F= 0.55mm T= 2.3mm 15/17 Jewels f = 18000 A/h power reserve 34h Balance staff U1078 Stem W1577 Mainspring / battery Zf3509, 2.00 x 17.0 x 0.21 x 500mm Hands 2.00 x 1.11 / 0.20mm Comments about the data | Remarks hunter calibre set-lever spring between plates options: bimetallic screw balance, Breguet hairspring, Reed's regulator differences not known between 292, 1720 family: open face / hunter respectively: 291/292 : H= 5.25mm, Breguet hairspring 293/294 : H= 4.14mm, Breguet hairspring 1719/1720: H= 5.25mm, flat- or Breguet hairspring 1721/1722: H= 4.14mm, flat- or Breguet hairspring Example, year: signature; shock device ca. 1920: Alpina, 1720 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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