Kienzle 57/21a

1963 pin-lever escapement with ruby pins (Fig.4) detached manual wind ratchet on dial side, crown mechanism with rocker bar Base movement and automatic module (Fig.5) are pillar designs, where almost all lubrication spots are freely accessible. Thus both can be maintained only partially disassembled. Modifications, especially varying rotor shapes, can't help with dating, due to the short manufacturing periode and missing records. differences not known between 57/21, 57/21a Even by simultaneous disassembling both, no differences were noticed, which not also exist between several samples of the 51/21. As the Kienzle 57/21a is rare compared with other family members, it was likely only produced in the last production year of the family.