HBC10

Spring and Barrel for Hermle movements. Fits time or strike side train on 141-010, 140-070, 140-080. Fits strike side train on 141-010, 141-070, 141-080, 141-051. Fits time side in 141-031. #10 would be stamped on the barrel. Measurements of actual mainspring: 17mm x .45mm x 1490mm. Caution on Removal.