Barrel, Complete with Mainspring and Cover, for HB 90 and HB 90e

Complete barrel with cover, barrel arbor and mainspring for HB 90 and HB 90e manual-winding movements. Mainspring 1.60 mm wide, 220 mm long.

Barrel & cover with barrel arbor and mainsprings

for HB 90 & HB 90e

The part is delivered loose, as shown

Mainspring for manual-winding movements

Mainspring width: 1.60 mm

Mainspring length: 220 mm

It weighs 0.565 g.

Mainspring diameter: probably 7.0 mm

Mainspring thickness: probably 0.08 mm