Are there two versions of this movement, one a 12 hour display and the other a 24 hour display? If that is the case, can a 12 hour display be converted to be a 24 hour display?

Hello Ken:

I know they made kits after the war to convert these one sweep 24-hour display to 12 hours, so I'm quite sure it's reversible.

Larry

Detailed information is to find right here on our site:

12 to 24 hour change back

Regards
Gerald

Thanks for the information. It was extremely helpful.