Have a look at the register sheet. (AVAILABLE ONLINE) I reckon U2211 fits in there nicely and may well be the original match to the frame.
Probably about May 1937 build
U prefix on engine number means it is an Ulster engine although, the top end originally would have been a bronze head with parallel inlets and radial exhaust valves.
THIS RUDGE WAS PART OF THE Mc MANUS CLASSIC BIKE COLLECTION SOLD THROUGH BONHAMS.
CAMPAIGNED IN VINTAGE MOTORCYCLE RACING (ridden by Richard Young) UNTIL MARCH 2007. THE ONLY OTHER MODIFICATIONS FROM FACTORY SPECIFICATIONS ARE A KICKSTARTER AND VALVE LIFTER. OFFERED WITH DATING CERTIFICATE, RECENTLY MOT'D (March 2007) WITH A CURRENT V5c
This Rudge starts and runs, comes with a UK made good quality steel Ulster style tank
THIS RUDGE CAN BE VIEWED IN OUR SHOWROOM DURING NORMAL OFFICE HOURS AND SATURDAY FROM 0900 UNTIL 1600
I MAY BE HAPPY TO TAKE ANOTHER BIKE PART EXCHANGE WITHIN THE SALE.
Originally registered on the 15th of April 1938 in Middlesex this elegant old Rudge has come to us with a binder (see photograph below) full of all sorts of great information, including many photographs,.....
I'm selling my Rudge Mini Motor which might be of interest to somebody. Selling as I have picked up a french VeloSolex. Along with my Moby X1, one of them has to go. This is a 1951 Rudge frame, twin.....