141337 1913 £1 SEAHORSE BLUE-GREEN (SG404) GOOD USED BLOCK OF FOUR.

1913 £1 SEAHORSE BLUE-GREEN (SG404) GOOD USED BLOCK OF FOUR. Good used block of four 1913 £1 Seahorse blue-green (SG404), with 'LONDON' cancellations 9 JUN 16. Slight faults but A VERY RARE BLOCK. (Ref 141337).