FYI:
I just used my "old" MR visa at an unattended tix machine at a tube stop in London to refill my Oyster card and it accepted the card even though I don't think it has the new chip technology.
As this is a heavily touristed Tube Stop -- Green Park -- it could be that no such chip filter technology was required here perhaps because of the number of Americans that use this stop.
Last edited by NJUPINTHEAIR; Oct 16, 2012 at 12:37 pm