Silverface Pro Reverb schematics vs the actual amp

[BrownIsound]

My amp accumulation disease seems to be waning toward a Pro Reverb and a Fender Reverb unit (or equivalent).

So in my internet sleuthing (having never have even seen nor played a Pro Reverb), I see the blackface AA165, then silverface AB668, AA1069, and AA270 schematics. The AA165 and AB668 do not have mid pots on either channel, but the AB1069 and AA270 schematics show a mid pot on the trem channel. However, my internet sleuthing on adds/pics of silverface amps shows amps up to at least 1974 with no mid pots.

So maybe someone with 1969-1974 is amps can confirm, do the schematics match with the exception of the mid pots in the trem channel (ie a Fender schematic error)? Or did these early 70s amps never adopt the schematics beyond the AA165 or AB668?