Specs: 350 or 750 frame from Japan (I think it was a 350); Triumph 675 front end -- street triple left fork, Daytona right fork. 1 radial caliper, 5 spoke wheel; 900ss aluminum swingarm, fox triple clicker rear shock; Monster 600 engine, bored out to 680cc with Ferracci kit; FCR 41 carbs; aluminum race 750 F1 tank, with the underside cut and shut to work with the FCR carbs; 5-spoke 17mm axle rear wheel from a 1000ss DS. Motoforza upper, lower, and tail, Ducati F1 pattern; custom front fairing mount; koso gauge; small li-ion batter under the seat; custom wiring harness with special Mosfet reg/rec; titanium 2-1 headers, Cone engineering megaphone exhaust; monster S2R rearsets.
Ducati made 350 V twins that were not imported into the US. They are from the correct Era. Very pretty bike you got there.
I don't ever remember seeing or hearing about them in the UK in the 90's either so they might well have not been imported there either, hence the confusion,
350 and 650 Alazurras. 1985 - 1987. Not imported into the US. Italian market. Cases were the same size. Cheers, Dave