On 1/18/2012 3:34 PM, GWRdriver wrote: > I ran across this item on eBay/UK today and I wonder if anyone has any idea > what locomotive they might be for? The item number is 170766048872, and the > scale/gauge doesn't so much matter, but they are 13cm diam x 21 spokes, and > have no crank throws and no counterbalances. So what in the world could they > be for? Harry, those could be for a Petrolea, which has 21 spoke drivers. Don't know what scale though. Possibly 3 1/2" gauge. JerryK MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.