These underprints are from the firm John & Christopher Boyd & Co.
They were a firm of Warehousemen trading from:
5, 6 and 7 Friday Street,
1867. Official underprint type 4 (under the gum) in red (1d.) or blue (2d.).
PP7 1d lake-red (SG 43 or G1)
Multiples of even the most common underprints and overprints are hard to come by. The only PP7 multiples I currently possess are horizontal pairs from plate 167 and 213.
Note. Plate 139 has been found unused.
Unofficial underprint type 5 (over the gum) in black.
Unofficial underprint type 5 (over the gum) in red.
PP12a 1d rose-red (C13)
Note. Plates 82 and 83 are currently unlisted by Stanley Gibbons with
Used on cover
A single perfin has provisionally been identified with J. & C. Boyd & Co.
See the Philatelic Links and References page for more information on Perfins.
The above underprints should not be confused with the overprint applied to stamps the firm used for receipt purposes. These stamps were overprinted with the words RECEIVED FOR J. & C. Boyd and Co.