Details
Perfekto mainsprings:
approximately 175 No. 10 (.7/8in. x 9ft.10in., hole); fifty No. 17 (1in. x 11ft.3in., h.c.); fifty No.14 (.7/8in. x 12ft., h.c.) (5)
approximately 175 No. 10 (.7/8in. x 9ft.10in., hole); fifty No. 17 (1in. x 11ft.3in., h.c.); fifty No.14 (.7/8in. x 12ft., h.c.) (5)