Interesting item here on UK Ebay - No 7161524191 - a Paris Double gents Ultra- short wheelbase tandem..fully renovated.
This is one of Harry Rensch machines , built with his "bilaminated" method at the head tube. I have a Rensch tandem but mine features twin lateral tubes running through from the head-tube through to the drop-outs., as featured in the Paris catalogue.
This Ebay model varies from any other Paris tandem I have seen... and I might have suspected that it should be transferred as a Rensch were it not for the departure in the design
Perhaps this really is a "Paris" not a Rensch... and therefore rare
Also, just starting out on UK Ebay...not the collectors auction, but sporting goods, is a "Chick" Allin bike, possibly from the 60s - looks understated and elegant. His frames enjoyed a very good reputation for reliabilty and ride quality... rather than their exotic lugwork
Norris Lockley..Settle UK