Rectangular stamps can be placed in a Perforating Machine 8 different ways (Face up from any of the four sides or gummed side up from any of the four sides). Johnson and Tomasson (Canadian Stamps with Perforated Initials) use a simple classification system to identify the position of the perfin die.
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Positions 1 to 4
Perfin insignia is readable as normal looking at the stamp. Position 1 is the commonest position. Each position is a 90 degree rotation from the previous position.
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Top
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Top
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1
4 2
3
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Top
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Top
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Positions 5 - 8
Perfin insignia is read as normal looking from the gummed side.
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5
8 (position) 6
7
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Legend
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Position
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Die
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Company
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1
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LA
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Legislative Assembly, Province of Ontario
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2
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PD
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Parke, Davis & Co., Montreal
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3
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PD
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Parke, Davis & Co., Montreal
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4
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W.J.G
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W.J. Gage Co., Toronto
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5
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SUN/LIFE
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Sun Life Assurance Co., Ottawa
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6
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PD
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Parke, Davis & Co., Montreal
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7
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C/GE
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Canadian General Electric Co.
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8
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PD
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Parke, Davis & Co., Montreal
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