Again welcome to the forum.I will contact Mike at Galaxy to confirm this.
If youre new to the transistor amp world again welcome and be very very careful as you first have lots to learn about not getting burned. Toshiba chinesium fakes have been around for about 10 years now and are popping up everywhere. Not saying theyre a bad transistor, they just aren't Toshibas. Texas star was using the 6j lot code fakes for about a year until they were called out on it. Thats when they went back to dei pills which are made by hg. Even being built by the same manufacturer the dei chips are inferior to the hg chips. Many reports of dei pills popping for no reason. Most builders have adopted hg as their primary transistor. I believe TS gets the dei pills cheaper in bulk than hg pills and just like the crappy wire and fuses thats why they use them.
Lots of junk "toshiba" amps popping up on Ebunk too. Hacked together and trying to get top dollar. Get close up pics so you can see every lot code as people are slapping in fakes with real to sell junk burned up boxes fast. If you still want to take the chance get pics on the insides and send them to a reliable builder/repair tech to confirm its not a giant pile of junk before bidding/buying.
As far as dei goes they get a vote of no confidence here.