Is it old or is it new :-) The Black Douglas Motorcycle Co. Hand-made motorcycles.
CW15-05 Triumph military bike
Triumph T110 outfit in Austria, 1962. Picture provided by the rider 53 years later.
CZ 450 modified. I would like to know the measurements of that expansion chamber.
JAWA 250 type 579. Swedish military motorcycle; note the attached skis for use in winter
1952 500cc, twin cylinder, 4-stroke Jawa
A Maserati motorcycle!!
Real motorcycling - A Ural outfit on the ice of Lake Baikal (Siberia)
VW, H-D, Moto Guzzi, Honda 450 ("Black Bomber") and possibly and other bits