In message 20131110073711347-email@domaincom, at 07:37:11 on Sun, 10
Nov 2013, kenw remarked:
You could do as I do, and have a simple plastic card holder fixed to my
belt by a spring clip. I pull it out to tap on the Oyster reader and it
then winds back to my belt.

Not everyone wears a belt, and especially not every one of the fairer
sex.
--
Roland Perry