ETA caliber MB 21.12
MB 21.12 description
Montblanc version of ETA Flatline E61.041
H 1,95 mm
∅ 18,20 mm
Hours, minutes.
Date, corrector.
Long Life.
8 Jewels.
Autonomy theoretic of battery: 74 months (battery 29 mAh) or 103 months. ( battery 40 mAh )