ive got a 66 super reverb in that condition, I thought mine was a fake, even inside this thing looks brand new, everything still sparkles, no tarnished washers etc, amazing amp you've got there, beautiful score.
What I like about these purchases is that you can simply not lose on re-sale..twenty years ago maybe yes, but not now, I reckon all the vintage stuff is going to skyrocket in the next 5-7 years and find its way to china, marshall , fender, anything old.