Straight lip front, three original transformers, Plexi glass front panel. Tubes are original period Mullard EL34's and three Brimar ECC83's.
A Plexi from the golden era of Marshall amplification. It's got a couple of minor changes, but where it matters, it is 100% original. It breaks up and starts to get loud around 6-7 whereas the gold aluminium JMP50's tend to go earlier. This leaves a lot of room between 1-5 for some really nice clean tones.
Two of the knobs are period correct replacements from 1968, but not original to this amp.