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 Fig. 1  Fig. 2 | Cyma 971 Features stem wind and set sub second Data 19''', Dm= 41.8mm H= 5.35mm 7/15 jewels f = 18000 A/h power reserve 42h Balance staff U252 Stem W255 Mainspring / battery Zf3423, 1.90 x 17.0 x 0.21 x 490mm Hands 1.76 x 1.10 / 0.28mm Comments about the data | Remarks open-face calibre Option: Breguet hairspring family/generations: old designation / hunter / open face respectively H= 5.35mm, normal stem mechanism: 19'''B / 914 / 915: just separate cock for escape wheel 19'''2B / 920 / 921: 1 bridge, 2 cocks for train 19'''5B / 950 / 951: 1 bridge for train 19'''6 / - / - : 2 cocks for train 19'''7 / 970 / 971: just separate cock for escape wheel 19'''9B / 990 / 991: 1 cock for train, except center wheel 19'''10B / 900 / 901: 1 bridge, 2 cocks for train, excape-wheel cock modified H= 5.35mm, negative stem mechanism: 19'''1B / 910 / 911: 1 bridge, 2 cocks for train 19'''3B / 930 / 931: 2 cocks for train 940 / 941 (Cyma 19'''4B): 1 bridge for train 19'''6B / 960 / 961: 1 cock for train H= 6.7mm, negative stem mechanism: 19'''1 / 918 / 919: 1 bridge, 2 cocks for train 19'''3 / 938 / 939: 2 cocks for train 19'''9 / 998 / 999: 1 cock for train, except center wheel H= 5.0mm, normal stem mechanism: 19'''15 / 954 / 955: 3 cocks for train Example, year: signature; shock device ca. 1920: Cyma, Swiss Made - 11412735 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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