Thanks to all those who helped, on- and off-list. Below is a summary of 26 x 1 1/4" tire sources:
26 x 1 1/4" tires were once popular in the UK These are equivalent to 32-597 or EA1 They are NOT the same as 26 x 1.25 In some cases Schwinn tyres labeled 26 x 1 3/8 (S6) will fit
SJS cycles in the UK carries Schalbe made tyres with black sidewalls
see
http://www.sjscycles.co.uk/
Jerry at memorylane has Taiwan-made tan sidewall as well as all-black in
stock
see
http://www.memorylane-classics.com/
Raleigh UK has this size (the photo shows tan sidewall but someone mentioned
that they only stock all-black)
See http://raleigh.co.uk/
The concensus is that Taiwanese tires are "workmanlike" and that there is no high-quality production nowadays.
If anyone has anything to add, please let me know.
Amir Avitzur
Ramat-Gan, Israel