How old is this 10 shilling UK bank note?My son just bought a 10 shilling bank note at an antiques fair for £1. The signature of the chief cashier is J.K. O'Brien. The series number is A91 or L, then a further 6 digits. All I could find through the internet is approximately 1960's but nothing on the A series, just b (£5 notes only) and C, 1963. Any ideas,... | |