This is a Silverface version of the Super Reverb that appears to have only been made a couple years (1974-1975). This version has a Master Volume AND a push-pull boost switch on the Master Volume knob. Also has 5U4 rectifier. Here's a schematic:
http://elektrotanya.com/PREVIEWS/63463243/23432455/fender/fender_cbs_45w_mstrvol_pullsw_super-pro-bmstr_rev_sch.pdf_1.png
Speakers are the original Fender blue label CTS 10" AlNiCo. Power tubes are original RCA black plates. Preamp tubes are all RCA except the tremolo oscillator, which is a newer tube. Has the original footswitch. The guitar is a 1988 American Standard Telecaster.