My Cuckoo clock needs new movement, but a clock repair guy says a new movement won't work because they don't have the metal plate (circled in red). Markings on the back plate

Why I Wont Be Servicing Your Clock For £40! How to Service a Smiths Clock.

How to fix a cuckoo clock chains?. Village Watch Center

How do analog/mechanical clockmakers measure how long a second will take when designing the clock? - Quora

My Cuckoo clock needs new movement, but a clock repair guy says a new movement won't work because they don't have the metal plate (circled in red). Markings on the back plate

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I have recorded a clock running extremely fast. The clock hands go full circle within roughly 10 seconds. Does anyone know why and how this happens? - Quora

DIY Cuckoo Clock Repair Guide - Bavarian ClockWorks