Hi Paul--no listing in Unitrade 2015 CDN. specialized catalog--the only coil is perf 10 Horizontal.Thought it may have come from a booklet with the bottom edge trimmed--however the booklets for the 6 cent centennial issue are either perfed on all 4 sides or perf on 3 sides with only one of the vertical sides with a straight edge.
Remains a mystery--will make a copy and take it to a club meeting in Jan to see if anyone has seen this or has any ideas on this item--almost all our members collect Canada with a few having very specialized Centennial issue collections
Harold
hi again---should have said that the booklets 460a and 460b do have 2 positions on each with a straight edge on the bottom and perfed on the other 3 sides--this could have been trimmed at the top ??
Harold
The bottom edge may have been trimmed. Would need to see a larger image of that site to see it better, but the right side of the bottom looks a bit uneven compared to the left side as if it had been cut.
At the top is the bottom edge of the stamp and at the bottom is the top edge of the stamp, magnified 4×. They're not quite parallel, supporting the idea that it was trimmed.
However, at the resolution posted, the difference in the height between left and right edges is 1 pixel out of 154. With an error of ±0.5 pixel, it means that the difference is between 0.33% and 1% of the stamp height, so whoever trimmed it did a good job.
As for whether the cut is straight, you could do a linear regression on the pixel intensity values for the different parts of the (purported) cut and see if they're consistent, but that's a lot of work. Plus I'd need a lossless image to do that.
Can I ask if this was the 6c issued in 1970 or the one issued previously coloured orange.
If the former can you give us a perf size?
Darnell lists two booklet stamps with 12.5 x 12 perfs, one on regular paper, the other on ribbed.
Regarding booklet stamps,the catalogue also states "The straight edges can have a single edge, 2 straight edges at right angles on any corner, also two parallel straight edges as is issued with coil rolls, 3 straight edges or 4 straight edges."
As another possibility this booklet may list the stamp http://www.adminware.ca/books/bk_cent.htm Maybe a member has a copy.
George, While this visually attuned community might expect to see the term "lossless image" every once in a while, you earn bonus points for mentioning "linear regression" in a stamp forum. Well done!
Steve
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"What are you waiting for? Those stamps aren't going to collect themselves."
Question: Is this actually a "vert. coil" stamp? I thought I knew the definition of "vertical coil" (stamps sold in rolls, with perforations at top and bottom rather than on left and right). But, not trusting my "knowledge," I googled it and found various stamps with perforations at top and bottom described as either "vertical" or "horizontal" coil stamps. That made me wonder if there are regional differences when it comes to describing coil stamp arrangement. Then I took a closer look at my admittedly old 2006 Unitrade catalogue, and found a Wilding coil, perforated on the sides, described as "Perf 9 1/2 vertical" and the Cameo coils, with perforations top and bottom, also described as "Perf 9 1/2 vertical". Obviously, one of those is in error, but which one?
Bob - The printing error in your edition of the Unitrade catalogue does not appear in the 2013 edition for Scott #406 to #409. 1962-1963 Rolls of 500 Cameo Issue - Coil Stamps - The coils are Perf 9-1/2 Horizontal.
Could it be that this stamp was issued sideways from the coil dispenser? - in view of the fact that definitives before this issue had the short side top and bottom, and the long side at the sides, and the machines would have to be modified to suit the new format !
Just a wild guess.
Malcolm
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