I just recieved my 20 off of ebay from Mill Valley, Ca. Mine is cherry also. Very little surface rust, nothing that a Brillo/SOS pad and some elbow grease can't fix. I found the date on the rear hub next to the "S" on the Sturmey Archer stamp. It's a 72. The seller said it was in storage for about 20 yrs. So I'm in the process of overhauling the bearings. I was careful to not do too much on the rear hub. I cleaned and re-greased the right side, but pretty much just added grease to the left side. I did'nt want to fool with it until I know what I'm doing. But after a good washing it looks almost new. Sheldon Browns' link to Sturmey Archer hubs will be a great help. Also checking out the Links of what other people have done to theirs will be helpful too.