Automatic Mainsprings 1.06mm - 1.10mm

Mainspring, 1.06 x 0.072 x 300 x 7.00, AUTOMATIC, ETA 2000-1 [GR2539-X]

Mainspring, 1.10 x 0.095 x 300 x 9.00, AUTOMATIC, Omega 330 [GR2605-X]