JUNIOR flip Clock

[dexns31]

Hello, I'm new here.
I own an old JUNIOR flip clock, as at this link: https://www.pinterest.com/pin/384635624406790529/
The problem is that the hours transferred on the twenty-fifth minute.
The mechanism is accurate, Standard Copal mechanism. Like most features two leaves for an hour, the first switch to 00 minutes instead of 25 and the other only 25 minutes from the next hour. Do you have any advice.
Thank you

[Mackey]

One thing I've done is to remove the metal tines that hold the flip tiles back, set to the hour, zero mins, then replace. This can be done without removing the motor usually. Good luck and thanks for joining us! Hope it works out ok. Please let us know.