CO9TS-6211-X equates to 39-45 full floating 3 3/16 bore with .002 undersize crank and .008 O S conrod bore.
Sorry, don't have a listing for 48-6211-U, however, C01TS-6211-U is for the Canadian locked in shell type bearings1939-45 3 1/16 bore.030 US/.008 OS.
C09TS-6211-U is for 1948-49 3 3/16 bore locked in bearings .030/.008 OS. Can we reasonably consider the 'U' suffix to denote .030/.008? Brian