Beddoe, Hulbert & Co. were a firm of Trimming Manufacturers and Warehousemen.
They operated from:
126/7 Wood Street,
5 1/2 Gutter Lane,
See also B. H. & H.
The underprint is believed to have been used from around 1874 (as the earliest recorded plate is 174 which was put to press on 20th April 1874).
1874. Unofficial underprint type 2 (over the gum) in black .
a) Vertical underprint, reading upwards
PP3 1d blue (SG 45 or G2)
b) Vertical underprint, reading downwards
PP5 1d lake-red (SG 43 or G1)
A single perfin has been identified as belonging to this firm. I do not have an illustration of the perfin but it is referenced in Tomkins as:
See the Philatelic Links and References page for more information on Perfins.