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Hello RLL, I did post some additional information about these program clocks in another post. If you click on my name and select "Find all posts by John Lippold" you will see the other post. If you down load the photos I posted, and enlarge them, I think you will be able to read more details about these clocks.
The clock in the photos is in my collection (S/N 282562). It is a little older than your clock (late 1924) but very similar. It also runs perfectly and rings a buzzer at various times as programmed... I hope this is helpful... John
hi new here, recently bought this IBM time clock or wheel clock . it has no no tag or serial number i can find. would like to know as much as i can . believe i just need a pendulum and a battery and it should work. the case is 65"x20"x8" was told it is capable running of 24 slaves. 12" face theres a small plate on the bottom that says model 2040. i couldnt make that number match anything. from the tip of the part the pendulum attaches to , to the top of the scale at the bottom is 39.5" how do i know how long of a pendulum i need? thanks for any and all info... Shane