SF VR, SR, TR...
I currently have a '71 Vibrolux Reverb that is absolute Heaven for cleans. It's a great "taste tester" amp for delay pedals, and similar stuff.
I know there's a circuit-specific reason for it, but the reverb in the silverface amps seems to be much more lush than in the BF counterparts...
The silverfaces truly shine for cleans - they make BF amps sound dirty and overdriven in comparison.
If you have only a passing fascination for playing surf/spaghetti western instrumentals, the silverface series are THE amps, IMO.
I'd love to snag a late 60's/early 70's Twin Reverb (and they are
cheap right now), but I just can't justify the brutal power of one, let alone retubing, recapping, replacing a pair of 12's, etc. - but SF TR's have got to be
it when it comes to shimmery cleans and reverb that will make you pee your pants