I have an ITR slave school clock and would like to hang it in my office and have it actually keep time. Any suggestions on how to supply power to it? The paper in the back of the clock indicates 12 VDC style # 14-47 and the date is Sept. 14, 1931.
Thanks, for your help

danno2cu@comcast.net, February 2007

If you want an accurate time piece you can build thione of these masters.
You can also buy a crystal controlled pulser and wire the secondary as a plain impulse movement (No self-correction (three wire movements)).

https://mb.nawcc.org/wiki/Encyclopedia-Subjects/Clocks/Development:-A-Computer-Based-Master-for-ITR-and-IBM-Minute-Impulse-Secondary-Clock-Movements

Joe Fox, June 2022

I have only just seen this. I am afraid that the answer is that you can't. Those ITR (IBM) Slave Clocks need to be connected to a Master Clock in order to keep time.

IBM have section on old clocks on www.ibm.com.

T, August 2010