Kleinuhren T-HakenNivaflex automatic mainsprings for wristwatches with T-hook Special mainsprings from Boley with T-hook. Subgroups IWC namewidthØthicknesslengthcalibreitem No.3716-DB1.2510.50,100340IWC 8394200770832626-DBH1.109.50.105320IWC 87, JLC 424942007708719-DBH1.8017.00,210540IWC 19H942007701952-DBH2.1018.00,200580IWC 529420077152972-DBH1,2015.00,180500IWC 97.294200770972 LONGINES namewidthØthicknesslengthcalibreitem No.3666-T1.409.50,100340LONG.10.629540077010624467-T1.6010.50.09340LONG. 10.689540077010685788-T2.0011.50.13360LONG. 13.319540077013316380-T2.3014.50.16500LONG. 17.689540077017686686-T2.5015.50.19500LONG. 18.689540077018684331-T1.515.50.19460LONG. 18.79N9540077018799L-T1.609.50.095360LONG. 9L9540077019L4490-T1.6011.00.10380LONG. 25.179540077025174210-T1.512.00.135400LONG. 30L9540077030516-T0.806.00.065220LONG. 5.16954007705162894-T1,207.50.09240LONG. 19.4954007701943281-T1.309.00.11280LONG. 10.89540077010842895-T1,208.00.09260LONG. 8.2395400770823868-T1.307.50.08260LONG. 8.68N95400770868 ZENITH namewidthØthicknesslengthcalibreitem No.2775-DBH1.156.50.075200ZENITH 57.899500770578