Longines oscillating weight bolt + screw cal. 501 503 505 506 507 508 / part 1491

Longines 501 oscillating weight bolt + screw / part 1491

Verrou de masse oscillante + vis

For all vintage Longines following calibers : Longines 501 503 505 506 507 508 (not for L506 nor L507 based on modern ETA movement)

Pre-owned/ pre-used