It's occurred to me I haven't chipped in with my info..
I own EMI m400 #140S. I released it from captivity about 6 years ago for £400 ukp. It was a complete wreck with a Gentle Giant tour sticker on it. It came with a story that it came from Jimmy Pages country home,(unverified). It had been stripped of its power supply. Enter Martin and John who rebuilt it so that it now sounds and plays brilliant.
Andy K