Zenith 25DC56 Restoration

[BeamT]

Greetings,

I have been looking for some time for an early 70s Zenith to restore and finally found a 25DC56 on FB Marketplace. The model sticker on the back is hopelessly faded. I believe this could be the Medford D4754W or the Bennett D4754W9. In the Zenith dealer pictures I can find, they appear identical, one being an early 1973 model, the other later in the year. I've not been able to locate any model information inside the set beyond the chassis stamp. The tripler, focus divider, and all of the safety caps are original.

Sams lists an 2 Photofacts 1312, and late production 1375.
Is there a way to determine which build it is?
Is Zenith CM-121 correct for either build of this chassis?

I'm hoping to get some service information before I start....

More pictures to follow...

Thanks in advance!