Brand MÜLLER-SCHLENKER Caliber 21 Size 18 Function T.W. Version Hands 0,50x2,00 Stem 13701 (kz) Stem (subs.) 13702 (lg) Stem (2 pce) Balance staff 53301 Balance staff (subs.) 57102 Mainspring (subs.) 2,2x17,0x0,21 Mainspring (subs.) Battery