I had 1954 R51/3---last of the plunger frame, first with full hubs----bought 1958, $400 under 10,000 miles, my sidecar (which I think one in picture is)Steib S-350----I bought mine 1958 for $50 attached to 500cc NSU,threw the NSU Konsul away------My R51/3 traded at 230,000 km----pretty much trouble free, comfortable with Heinrich Faring (uppers and lowers) Used sidecar in winter-----solo gearing of bike sometimes required 3rd gear instead of 4th