"Arc at Left Centre b", but here the arc is more to the centre of the portrait oval.There is also a mark in the bottom arm of the 'E' of Postage which resembles a 'notch' - see notes below image."> "Arc at Left Centre b", but here the arc is more to the centre of the portrait oval.There is also a mark in the bottom arm of the 'E' of Postage which resembles a 'notch' - see notes below image."/>
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Last Updated: Aug 12, 2025

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ARC Notch

Posted on Feb 11, 2022

7¢ Bistre Arc at Left Centre a

In the left outer oval a guide dot is bisected by a shallow arc. Quite similar to "Arc at Left Centre b", but here the arc is more to the centre of the portrait oval.There is also a mark in the bottom arm of the 'E' of Postage which resembles a 'notch' - see notes below image.

Flaw in Zone 16
Plate Position: Unknown
Not listed in Marler
Sheet Format
Notch Type: E

On page 374, Marler states: "In 19 Subjects of Plates 1 and 2 there is in the white band around the portrait oval, either below E or at right center, either a single line or a group of lines. Whether this is a consequence of a re-entry or not, the author cannot say, but he considers them not to be of sufficient importance to warrant describing them, particularly as many of them are much the same in their general appearance."

In an article to be published in a future issue of "The Admiral's Log", Leopold Beaudet and I suggest that these "Notch" varieties are actually quite interesting. We have found over 40 different instances and many plate positions have been determined using the plate proofs at Library and Archives Canada.

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