Nice find! Those are absolutely Conn mono amplifiers using (and you can probably verify this quickly) a 48530 (OPT) and 48531 (power transformer) a pair of 6L6 (various forms including 6l6, 6L6G, and I have seen them with 6L6GCs), a 5U4 rectifier, 6J5 and a 6SN7. I might have the transformer numbers mixed up, btw...
It has a pure triode output (no ultralinear tap) and the power transformer, as mentioned is pretty beefy. I had a pair that now belong to squidward and currently have another set of three I have picked up since. I'm also bidding on a set of three on ebay currently but doubt I can afford them right now.
When rebuilt, I have heard of people preferring these to MC30s, but like almost every review, you have to take it with a grain of salt. I can tell you that the pair that are now in Ed's possession sounded very good in original condition, I'd love to hear what then can do with a fresh recap.
Good luck with them!