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Mike
Mike, Consultant
Category: Clock Repair
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What are the BPM for Hermle movement # 109-A. The number on

Customer Question

What are the BPM for Hermle movement # 109-A. The number on the clock is 451-050. 85cm /90-997
Submitted: 1 month ago.
Category: Clock Repair
Expert:  Mike replied 1 month ago.

Hi, My name is ***** ***** it is my pleasure to assist you. The bpm is 66.00. Thanks Mike.

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The Hermle service manual dated May 2002 (5th printing) lists the meaning of the numbers on the movement plates as follows:
Line 1..Year of Manufacture Line 2..Company name/logo; Line 3...model number; Line 4: pendulum length (underlined); Line 5: beats per minute. The data will appear as follows;
F Year of Manuf:
Hermle
451-050
85 cm Pendulum Length
66.00 Beats per minute.
In 1988 Hermle started using letters to identify the year of manufacture A= 1988, B} 1989, C=1990, D=1991, etc.. Before 1988 the company stamped the last two digits of the year of manufacture on the back plate. Hope this answers your question.

Expert:  Mike replied 1 month ago.

Hi, I was wondering if you need further assistance with your clock? Thanks Mike

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