Kienzle 58/21

1956-1963 (whole family) pin-lever escapement with ruby pins (Fig.3) detached manual wind ratchet on dial side, crown mechanism with rocker bar Base movement and automatic module (Fig.4) 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 57/22, 58/21 The varying balances with pulse jewel on a spoke (example 58/21) or pulse jewel on a bigger hub (example 57/22) are also met in other calibres of the family.