Custom 50 Question

[Squidfiddle]

Is there any difference between a custom 50 built in 10/13 and a brand new one? I know the front cover/grille is different but what about the amp itself?

 

[dmatthews]

I know that the 2 channel H went through some revision changes, so no surprise if the Custom 50 (or any other current amp) follows suit. PTC is pretty transparent, why not get in touch?