Thanks David. I saw the shape in the cylinder castings but thought it would place the cam too high to match pushrod tunnels.
Having been heavily involved in the marque in the past, would be interested to hear your findings.
I'll keep you posted.
The only other one I can find a trace of on the 'net is a 1957 Type III in the Guzzi museum. There is a picture of that one in the Colombo book, but I only found that after Peter's prompting that it is a prototype. The pictures are just past half way down
this page. The bike is very different to mine and I think it may have something like the marching gear you mentioned as there is a cable operated arm near the gearbox which isn't the clutch, as that is under the oil tank.
The caption translates as" "These are three views of a vehicle that he never even saw the production line, the version was a study for the military use of a motorcycle derived from the Lodola, but with a displacement capacity of 350 cc, 4-stroke engine, light alloy head and cylinder, overhead valves, no other data are known."
