400 Day Clock Suspension Unit 18A can be identified in the Horolovar 400- Day Repair Guide and is the same as Unit 18B and 18C. To decipher what type of suspension unit is needed you must first identify the back plate of a 400 day clock using the Horolovar 400- Day Repair Guide. To be used for Petersen Standard 53, Petersen Standard 54.
A
|
B
|
Total Length
|
111.5mm
|
6 mm
|
136mm
|
Note: Please see enlarge image for measurement explanation.