341-020A Hermle movement

[Jim_Miller]

I’ve got a 341-020A pendulum movement in for service. I’ve been searching but cannot find what the “A” means at the end of the model number. I’m not sure if it’s merely a date code or if signifies a difference from model#341-020. I’ve found a reference to it in my Hermle service manual but no information. Can anyone shed any light on this?
Thanks,
Jim

 

[MARK A. BUTTERWORTH]

Hermle adds a letter code after the movement number anytime an engineering change is made to the parts that make up the movement. In this specific example the hammer wires were changed from round to flat wire. The lifting mechanism for the the hammers was also changed. This is done to identify the parts that make up the movement

 

[Jim_Miller]

Thank you very much Mark. I appreciate the information
Jim