Deciphering Hermle Movement Numbers

Hermle uses a 6 or 7 digit number code to designate whether it is spring, chain or cable driven, the plate size, hammer arrangement and the hand shaft length.

 
Examples of Hermle Movement Numbers:
 
 
Go back to Hermle Mechanical Clock Movements.
 
  A: The series number which determines plate size, and how it is driven.
     
   
130 ROUND WITH 90 mm plates always time and strike
140 PLATES 85 x 98 mm 14 day T/S
150 same as 140 except 8 day
240 same as 140 except weight driven
260

PLATES 87 x 87 mm Always weight driven w/ chains

340 PLATES 100 x 100 mm Spring Wind Westminster
350 PLATES 120 x 120 mm Spring Wind Westminster
451 PLATES 120 x 120 mm Weight Driven Westminster
461 PLATES 140 x 200 mm Weight Driven Westminster
471 PLATES 152 x 220 mm Weight Driven Westminster
1050 PLATES 120 x 120 mm Spring Driven Triple Chime
1151 PLATES 120 x 120 mm Weight Driven Triple Chime
1161 PLATES 140 x 200 mm Weight Driven Triple Chime
1171 PLATES 152 x 220 mm Weight Driven Triple Chime
     
  B:
0 Indicates balance regulated
1 Indicates pendulum regulated
2 Indicates platform balance as in ship's strike
     
  C:
0 Used for both spring and chain drive
8 Used for cable drive
     
  D:
1 Indicates bottom hammer bim-bam
2

Indicates bottom hammer all other- except 130 series

3 Indicates side hammer
4

Indicates back hammer on gong

5 Indicates separate back hammers for chime and strike
6 Indicates single set back hammers at 45 degrees
7

Indicates back hammer on bell

8 Indicates top hammer
     
  E:
1 Indicates hand shaft length 33 mm
2 Indicates hand shaft length 27 mm
3 Indicates hand shaft length 53 mm
     

The pendulum length the movement is geared for and the beats per minute are also found on the back plate of Hermle Clock Movements.