Rolex NOS balance wheel B3186-432-G1 for calibers 3130, 3135 etc. Parachrom hairspring in blister

The Rolex NOS balance wheel B3186-432-G1 is compatible with calibers 3130, 3135, 3136, 3155, 3185, and 3186.

It features a Parachrom hairspring and comes factory-sealed in its blister.

The balance wheel is in new condition and is highly sought after.