Technical Mallory magspark flathead

Tried the search function and didn't get my answer so thought I would try a post. I picked this up with a 51 8cm flathead. Would like to identify it and what would be the best route to go in using it? Not seeing a 6p or 6n on the cap nor 12p or 12n so not sure how to check for voltage. Send it to Bubba's for some kind of one wire update?

 

Its a distributor....works for whatever voltage your coil is.

 

Old stuff is new to me so wasn't sure if anything would be voltage sensitive.

 

… I have a complete NOS Magspark system for a Y block and that has a vacuum plate Dist.; is yours vac?
If you do a Magspark search in Tech there is some good info there.