Ressort principal pour les montres-bracelets à remontage manuel.
Convient aux calibres suivants :
BUR 380, BUR 381, BUR 382, BUR 383, CAR 11-0FC, CAR 11OFC, CAR 11OHC, ELG 328 11.5L, ELG 883, FF 74, FF 741, FF 745, FF 745-4N, FF 969, FF 969N, FF 96N, KIE 058/01, KIE 058/02, KIE 058/15, KIE 058B/02, KIE 058B/12, KIE 058B/15, KIE 058B/25, LIP 253, LIP 253TC, LIP R25, LIP R25TC, MF 595, RON 6213, RON 6215, RON 6313, STA 96, STA 96-4, STA 969, STA 969-4, STA 969N, STA 96N, TAV 370, TAV 371, UNI 129, UNI 262, UNI 263, VEN 210, WCX D501, WYL WH38, WYL WH39
