FBT Bass combo - any info?

[rushbo]

Whilst browsing on Shpock for bass related bargains, I came upon a bit of a curio - an FBT MM 83/B bass combo. As the seller was approximately 1km from my front door and I was able to negotiate a pocket money price for it,  I took a punt. Some switch cleaner and some hard scrubbing of filthy tolex later, it's turned out to be a fairly decent bit of kit. It's solidly built and sounds pretty cool.

...but it's a bit of a mystery. It's 80w, so it's never going to trouble my Genz Benz Contour rig as my gigging combo, but it'll be useful for the occasional acoustic/drummerless gig.  It's made in Italy and dates from about 1980 (there's a very similar practice combo on the 'net which the owner thinks dates from then...) but I don't know much more than that. Thanks to the miracle of Google Translate, I found out that FBT was known as "The Italian Marshall", apparently. There are two or three similar looking amps/combos detailed online but precious little info. FBT specialise in PA gear now, it seems.

Any Italian amp specialists out there who can shed any light on this?