Winding stems    Balance staffs    Mainsprings

Omega backwind crown + stem cal. 640 steel (without the screw)

37.9 EUR Omega crown + winding stem cal. 640 steel (without the screw, il manque la vis) Pre-owned / Pre-used Couronne Omega calibre 640

Omega crown cal. 540 thread 80

17.9 EUR Omega crown cal. 540 gold color / Couronne Omega occasion Thread 80 / Filetage 80 Diameter : 3.5 mm Pre-owned / it was initially screwed with a Omega 540 winding stem

Omega crown NAIAD 5.4 mm thread 90

89.0 EUR Omega crown NAIAD gold color / couronne Omega Naiad Pre-used , good condition Diameter of the crown : 5.4 mm Thread 90 Total thickness : 3.3 mm Thickness without the inner tube : 3.0 mm (around)...

Omega crown 5.5mm thread 120 never used

139.0 EUR Rare Omega vintage crown  / Ancienne couronne Omega neuve de stock New old stock, never used / Neuf de stock Diameter of the crown : 5.5 mm Thread 120 / Filetage 120 Total thickness : 2.7 mm with...