Cyma 19" 6 open-face

open-face calibre Breguet hairspring stem mechanism without setting-lever spring between plates (Fig.3) two-part crown wheel with big bearing This detail is easy to recognise, because the crown-wheel screw head rotates during winding. Attention: This screw is right handed. The assignment of this calibre to the family below is uncertain, because it is nowhere listed. Likely the strange crown mechanism is an option for the else equal Cyma 19" 3B. The designation Cyma 19" 6 is based on a vague assignment to the stem DCN 1539 (after the taken dimensions, the only available). It is not known whether samples with a newer designation exist.