Updated: Thanks to the nice comments, this is an FR-40, not a TR-60 like I originally thought.
Check out this super sexy organ amplifier from the Farfisa Company. The mod styling and colors make this amp really like no other. Great for any organ or guitar, this amp has 2 – 12″ Speakers, Reverb, Tremolo, and enough eq to make any sound sculpting Farfisa boy or girl very happy!
Also check out this clip of some random dude on youtube bust out some blues guitar through this amp.
Most portable Farfisa organs had a 16 pin connector for bass pedals. The standard bass pedals are a standard octave plus one note, from C to C. With the exception of the Mini Compact, most of the Compact Series, VIP Series, and Pro Series organs can take these pedals. Now the pedals are not super cool synthesizers like the Moog Taurus pedals, but instead just a controller for the circuitry onboard the organ. The 16 pins are for each of the 13 note, and 3 for the juice (positive, negative, and ground I imagine).
The ever elusive Farfisa Sferasound pedal photographed in the wild (below). The Sferasound was built into the standard 70s era Farfisa plastic wah housing, and supposedly was some sort of chorus-y, rotating speaker, phaser-type effect.