Help me identify an amp


My father, who recently passed away, was an avid audiophile and very proud of his stereo. I’ve been taking inventory of his gear, and while most things are easy to identify, I can’t find any distinguishing marks on this power amp. Can anyone help me identify it? The power tubes are 8417s. Thank you!
https://imgur.com/a/A2cJAFq

dungen

It could be that it was made by an individual on a blank chassis. There are a lot of amps like that around.

The chassis, layout, transformers are from a Dyna ST70 but one that has been significantly modified in many way.  I suggest a search for Dyna mods with 8417s to see if you can find a match.