Your amp, according to Jadis's website uses 3 12au7s and 2 12ax7s. From the pics, there are 3 small tubes upfront, then two behind. I would think the 3 upfront are the 12au7s (just a guess).
My DA-8 has 12aus upfront and 12ax7s behind.
Goodluck.
My DA-8 has 12aus upfront and 12ax7s behind.
Goodluck.