It is indeed my old ZB Student that I gigged in the early nineties.
Unfortunately, it looks as though it has lost some of my modifications, which were added to make the steel super-easy to play (mechanically), but it still has the 4 knee levers and the adjustable half stop on it.
It is also minus the 'C' pedal linkage, the same as it was all those years ago, when my younger self deemed the 'C' pedal surplus to requirements
£300 to £400, maybe more if you ebay it.
I would like to have it back, just for old times sake (as I sold it to fund a new stair carpet

) , but I just can't justify having another steel, my house isn't the Tardis