There is a very rare Claud Butler Twin Tube (Saxon) on UK eBay at the
moment. This frame is a 1956 model with the All-Rounder Bilaminations. I
am positive that they only made the bilaminated model for this one year
1956. All previous CB TT Saxons were plain welded (lugless) 1952
through to 55.
The colour scheme is not my cup of tea but a very rare and interesting
frame indeed. Don't let this colour your judgement!
http://cgi.ebay.co.uk/