The 1942-48 War Effort Issue Part Three
OHMS Perfins and Overprints
This was the first issue to feature both OHMS perfins and overprints in the same set.
OHMS Perfins
The only perfin type in use at this point was the 4-hole type shown above. However, there were three sub-types of the 4-hole type, the second of which came into use in 1942:
The first type, which was used until 1946, has a narrow "O", which can be difficult to identify if you are not familiar with these. However, this type can be positively identified by looking at the seventh hole from the top of the "S" and noting where it is in relation to the first and sixth holes. The first and sixth holes are aligned vertically. However, the seventh pin is not quite vertically aligned with these two pins, being just slightly off to the right of them. The second type, which was in use between 1942 and 1949 occurs on seven of the 10 dies used during this period. It is characterized by a wider "O", but also by the fact that the seventh hole of t…
This was the first issue to feature both OHMS perfins and overprints in the same set.
OHMS Perfins
The only perfin type in use at this point was the 4-hole type shown above. However, there were three sub-types of the 4-hole type, the second of which came into use in 1942:
The first type, which was used until 1946, has a narrow "O", which can be difficult to identify if you are not familiar with these. However, this type can be positively identified by looking at the seventh hole from the top of the "S" and noting where it is in relation to the first and sixth holes. The first and sixth holes are aligned vertically. However, the seventh pin is not quite vertically aligned with these two pins, being just slightly off to the right of them. The second type, which was in use between 1942 and 1949 occurs on seven of the 10 dies used during this period. It is characterized by a wider "O", but also by the fact that the seventh hole of t…