This might be of interest a Claud Butler USWB tandem on ebay for sale. At a guess this looks like a C.B. Ranger Tandem model dating form the late 1940's. I am no expert but the fork rake looks to be Ranger and not USWB which was a lot steeper and racier . All of the Rangers I have seen were of lugless construction but I think they made a lugged version as well?
Perhaps one of the CB experts on the list will take a look an venture an opinion. Appears to have its original chainsets and extension (stem) plus you are getting some great campag large flange hubs.
No connection to seller. Item No.712462302
Thats all for now. Keep those wheels spinning, in your memories if not still on the road. Be lucky Mick Butler Huntingdon UK.