340 cc (60 x 60 mm) a.i.v.-engine
main changes from type C:
new, rounder shape for petrol/oil tank,
new frame with slightly lower engine position and differtent lug for rear end (positioned a bit higher up)
valanced mudguards
timing gear is now encased.
availlable as single speeder (direct drive) or with two speed gearbox (with primary chain and secondary belt, on the same side!). 'box was also available as a an extra to be fitted later.
pictures from 1911 catalogue and my own model D (single gear)
Michiel
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