Great Britain 1873 6d grey Plate 14 Specimens, SG147s.
A very fine and fresh unused, with original gum, left wing margin right hand marginal block of eight lettered "FI-GL", overprinted "SPECIMEN" type 8. Horizontal crease through the top row and a couple of shortish perforations.
A very rare multiple, the type 8 overprint due to its size was rarely used on the small format stamps.
SG Catalogue Value: £2,400+.