How do you find out if the iron and caps are original?

[vice2.0]

Hey guys. As the title suggests I'm trying to find out if the original transformers and caps are original in old amps?

I know from the 80's JCM 800 Drake days it'd be stamped and have paper attached.

is it different in 70's models? Are they stamped or noted somehow?

Cheers
Michael

 

[giam23]

depends on the amp and exact era, most have us here on the forum have seen hundreds if not thousands of these amps and know exactly what is right and not, post photos here and we will be able to tell you. especially in the 60s and 70s marshall would change things so often so you really have to know what you are looking at

 

[Tatzmann]

First sniff, then taste. It should smell and taste exactly like fish&chips!