Torsion pendulum spring 53B for Hermle Electronic, wire length 79 mm Dimensions: Working length (from hole to pin): 86 mm Wire length: 79 mm Driving distance: 7 mm Blade thickness: 0.07 mm .
| Type | pendulum spring |
| Brand | Ernst Westphal e.K. |
Torsion pendulum spring 53B for Hermle Electronic, wire length 79 mm Dimensions: Working length (from hole to pin): 86 mm Wire length: 79 mm Driving distance: 7 mm Blade thickness: 0.07 mm .