©
velocifer: Dürkopp 1927
©
velocifer: Dürkopp 1927 racing machine Diana 115
©
velocifer: Dürkopp 1927 track bike Diana 116
©
velocifer: Dürkopp 1927 different handle bar types
©
velocifer: Dürkopp 1927 Diana 119
©
velocifer: Dürkopp c1935
©
velocifer: Dürkopp c1935 racing machine no. 115
©
velocifer: Dürkopp c1935 track bike No. 116
©
velocifer: Dürkopp c1935 hubs pedals
©
velocifer: Dürkopp cranks circa 1950
©
velocifer: Dürkopp hubs and pedal, circa 1950
©
velocifer: Dürkopp models 115 and 116, circa 1950
©
velocifer: Dürkopp circa 1949_mod. 115
©
velocifer: Dürkopp circa 1949
©
velocifer: Dürkopp circa 1949_parts
©
velocifer: Dürkopp circa 1949_Mod. 116