How to identify tube amp

You may need to use a variac to start them up??
Also, maybe some pictures of them set up from back in the day?

They are push-pull amps using octal tubes as finals and 9-pin miniutures as driver and phase splitter. They appear to be made by a skilled home constructor rather than being commercially produced.

Since we are speculating, I would guess a 12AX7 followed by a 12AU7 with KT88/6550 as outputs. The fact that there are no tubes in them may be indicative of problems. Remove the bottoms and look for any burn marks or bulging capacitors, check all fuses for continuity using a multi tester before bringing the amps up with a variac. Don’t want to let the blue smoke out.

This surfer dude is messing with you boys. Cryptic photos that
don't show the whole product. Did these mono blocks arrive by carrier pigeon? 
-Skeptic

@viridian thanks very much for your input!  I added a couple pics of the bottom to my g-drive file. It looks clean but definitely old. I suspect they’ve been sitting in storage for 20+ years. No burn marks tha I can see. The back plate is standard two speaker cable outputs and a single rca input.

Here’s the link to the pictures:

https://drive.google.com/drive/folders/1EJxV4DfNr4k7Mq8rZp96iPuHY10sKW_z

@firstnot if you don’t have anything useful to say then I ask you leave my thread. No need for rude and useless comments. Thanks.