|
H
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| Hair line - fine
scratches on a plate or cylinder which print in the colour of the ink employed. |
|
| Hand-stamp - postmark (cancellation) or overprint applied by hand to a cover or to an adhesive stamp. Such a marking is said to be 'hand-struck'. |
|
| Harrison - manufacturer of paper used on Elizabethan-era stamps. First seen in August 1983.
The gum has a
blue-green tinge and the paper curls. |

Inscription showing 'H' for Harrison paper |
| Harrow perf - both vertical and horizontal
perforations done on a whole sheet of stamps in one pressure or operation, as opposed to the piecemeal methods of
line and 'comb'. |
|
| 'Hidden' date - small year date 'hidden' in the design of Canadian stamps indicating the year of printing (or copyright of design).
Most Canadian stamps since 1935 have a "hidden date"
(the first being the King George V Pictorial Issue
of 1935).
A couple of more recent issues have the "hidden
date" incorporated into the
tagging (an
example is Scott 2003, the $1.25 Riopelle souvenir
sheet issued in 2003). |

Hidden date

Hidden date on 1935 issue |
| Hinge - stamp hinges are round-cornered oblong pieces of tough, thin paper, gummed on one side and designed for the neat mounting of stamps in the
album. See
Mounts. |
|
| Horiz. Horizontal. As opposed to
vert., the vertical or upright, when describing the format of a stamp. |
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