I recently found and joined PM and YSBG.
I acquired a small lathe for home/hobby use and am just beginning my research,
prior to spinning it up.  I think it is as follows:

S/N: 31250 KAR - making this a circa mid-70's 10K?

Cat #: CL 770 R - the "R" bed length seems correct (4.5'),
but the prefix (CL) is poorly stamped and I could not find a cross-ref to 770 on the SB site.
I will be buying the S/N card from SB and will re-confirm this Cat # with you.

The lathe is mounted on a cabinet, has a motor mounted horizontally on the rear of the cabinet,
uses a fabric flat belt with metal clips.
I don't recall the belt type between the motor and secondary shaft,
(Is this called the counter-shaft?), but I think it is a v-belt.
The motor is 3-phase so I need to do electrical work before spin-up.
I already have a start-up converter,
hopefully the load will allow for non-continuous 3 phase with the electronic third leg.
I also need to review lubrication points before spinning as it has been cold for a while.

The lathe came with a set of collets (5C?) but does not have a draw-bar or closer sleeve.
It has a 4-jaw chuck attached, no tool post/holders and no tailstock centers.
Hopefully I can find a collet closer somewhere,
I am sure a tool post and live/dead centers can be had commercially.

Thanks for all the effort to pull this info together... and thanks for listening.

Cheers,

++ Jim