Longines mainspring 17L 37.9ABC

1 Longines mainspring / Ressort de barillet / Zugfeder

Original Longines part

cal : 17L and 37.9ABC (not for 37.9 nor 37.9M nor 37.93)

Height 2.00 mm

Bride à ailettes / T-brace

New old stock / neuf de stock