![400 Day Clock Suspension Unit 20B (11142333199)](http://perrinwatchparts.com/cdn/shop/products/78.225-600_600x600.jpg?v=1595352445)
400 Day Clock Suspension Unit 20B can be identified in the Horolovar 400- Day Repair Guide. 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 Herr Standard 54.
A
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B
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Total Length
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98mm
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6mm
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123.5mm
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Note: Please see enlarge image for measurement explanation.