What transformers in a '72 Marshall?

[DEMENTED]

I have a '72 Marshall JMP 50 watter and know the OT has been replaced with a Drake from 1992. What should be in there for trannies? Pics, brands, model numbers all that stuff would help. Also, how much do you think it devalues an otherwise stock, clean amp?

[Dave C]

Brian, see if this helps.

http://marstran.com/