I've just acquired a small lot of railway letter stamps - this is probably the pick of the bunch! This is from the Cavan and Leitrim Railway which operated until 1959 and included the last steam tramway service in the UK. Always printed in small numbers this is a very rare unmounted mint block of 6. Other lines in this lot included the Southwold Railway, Castlederg and Victoria Bridge, Garstang and Knott End, Shropshire and Montgomeryshire and West Clare Railway.