In message , at 18:40:11 on Mon, 6 Jan
2014, tim...... remarked:
I've been using the Euro, day in day out, for 50% of the time since the
day they were minted, and I still can't tell what value a random small
coin is, without reading the value on it.

Perhaps you aren't suited to be being an international traveller then.
I've never had such a problem with numerous trips using USA and Swiss
currency, in addition to UK/Euro. Or even Dubai, India, Lithuania and
Australia on my trips there.

I wonder if there's a recognised expression for it (a bit like dyslexia
for words).
--
Roland Perry