[morzh]

Explaining:

New parts look very different from old ones.
For some people it does not matter, they care only about functionality, the parts are under chassis, so no one sees them.

Some folks want old parts, like capacitors, restuffed with new parts. And using cloth covered wire. This way it looks more authentic.

A few people like it authentic looking under chassis all the way, that is if a resistor gets replaced (you cannot restuff od resistors with new, unlike capacitors) a new resistor is molded over with epoxies, or gets otherwise inserted into something, and then painted to the oiginal specs to look exactly like the old one did.
Then chassis itself may need or need not to get cleaned in such a way that it looks factory fresh.

This last one performed by very few folks.
Russ is one of them, he does museum quality restorations. I am sure this should cost quite a bit more than functional restoration. Which is good enough for many, after all the radio will operate to original secifications.