I have not opened my Tremoverb in over ten years. I can not remember what it says in it. I bought it a few months after they came out. It has the EIA-606 Schumacher transformer. I have played on several Tremovebs and at least 50 various Dual Rectifiers...... No two sounded the same. They all sounded different.... Some very different.
Me and two friends got four Tremoverbs together in one room and I was surprised in how different they sounded.
I have two Tremoverbs here now with close serial numbers.... Even if I switch the same tubes into both amps they feel and sound pretty different.....