Jim
It is very similar, with the addition of the second 12AT7 tube.
The power inlet speaker outs and three sets of RCA inputs line up left to right across the back.
The new PT-8 is centered between the plate chokes and OTs just in front of the ins and outs.
Moving forward the hum pots are next, spaced well apart with smallish horizontal vents between them.
The tube compliment is next. L to R : 2A3, 3 long vertical vents, 12AT7, 12AT7, 3 long vertical vents, 2A3. The tubes are evenly spaced with the 2A3s aligned in front of the hum pots.
The controls along the front are rotary input, balance, volume and the mini toggle on/off, again left to right.
Very Bottlehead. Hope that helps.