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| Index | Timepiece Archive, Categories | Archive: Watch Movements | Timepiece Market |
 Fig. 1  Fig. 2 | AHS 42 Features manual wind sweep second Data 10.5''', Dm= 23.7mm, Do= 24.35mm H= 5.05mm F= 0.55mm T= 2.1mm 0/1 jewels f = 18000 A/h power-reserve 37h Balance staff U1428 / U2607 (staff with slot D= 0,6mm / 0,55mm) U2512 (single roller) U3118 (double roller) Stem W2238 Mainspring / battery Zf1391, 1.70 x 9.0 x 0.12 x 240mm Hands 1.42 x 0.80 x 0.21mm Comments about the data | Remarks pin-lever escapement ratchet on dial side, crown mechanism with rocker bar balance versions: staff with slot, single roller, double roller The distance between balance bearings is adjusted either by the common screwed point bearing on the dial side (cf. AHS 40), or more sensitive and service-friendly by a screw bending the balance cock or -bridge (Fig.1). Late samples have a balance bridge instead of a cock, and are signed on the dial side as AHS 42. It is not yet known, which variants were made with this layout. Often a wrong or no calibre signature is present. family: 40: sub second, pointed staff 41: sub second, pivoted staff 42: sweep second, pointed staff 42(CLD): sweep second, date, pointed staff 43: sweep second, pivoted staff 43(CLD): sweep second, date, pivoted staff 44: no second, pointed staff 45: sub second, jewelled pointed staff 46: sweep second, jewelled pointed staff 47: no second, jewelled pointed staff 54: no second, date, pointed staff 56: sweep second, date, jewelled pointed staff Example, year: signature; shock device ca. 1975: AHS 43 (AHS 42, wrong signature) 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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