Scott 882A - Correct Perforation..??

Hi

I am doing a lot of investigation lately on Canadian stamp perforation measurements.

I have a block Scott 882a printed in March 1981....5,688,000 were printed according to Archives Canada...Below is the discrepancy I have with this (these) stamps assigned perforations...All perforation measurement adjustments are done with mint stamps only to remove the probability of shrinkage with soaking processes.

1 - Catalouge - 13.3 x 13.3
2 - Archives Canada - 13.5 x 13.5
3 - Actual perforation - 13.0 x 13.3



Below is two measurements taken of the same stamp...
One stamp using 13.3 x 13.3 measurement
One stamp using 13.0 x 13.3 measurement



There is enough discrepancies with some Canadian stamps, that some one should pay attention to the accuracy of posted perforation measurements....I tried contacting BNAPS to see if they were interested in crating a new study group called "Perforation Measurement Adjustment", but have no heard whether or not it is worth while implementing.

Courtesy and information owned by Archives Canada


I have found at least 30+ discrepancies so far...Many, many, more out there.

Robert

Hi Robert - I think the effort is warranted! Be interesting to see what BNAPS says in response to your query. Chris

Talking to BNAPS...I don't think it will become a new process in the study group area...That is ok...On to the next stamp investigations.

Robert

wert: You are doing a great job by bringing this to our attention and by taking the correct gauge readings for them.

Thanks jogil

Coming from the "Perforation Guru", those are kind words.
Will continue to investigate others.

Robert

Here is another stamp perforation inaccuracy.
This stamp is a Scott 482a "Military Aircraft" stamp series.

1 - Book perforation assigned 13.3 x 13.3
2 - Library and Archives Canada assigned 13.0 x 13.5
3 - Actual perforation 13.0 x 13.5



Below is perforation taken with software and a unitrade Associates perfect gauge....Left stamp taken with 13.3 perforation assigned...Right stamp taken with 13.0 gauge.



Library and Archives Canada assigned perforation...Courtesy of and owner of information via Library and Archives Canada.

One more perforation assigned adjustment.
Here is the Scott 883 "Vancouver Island Marmot" 1977-1981 Stamp.

Book perforation assigned - 13.3 x 13.3
Library ad Archives Canada perforation assigned - 13.0 x 13.5
Actual perforation measurement - 13.1 x 13.3


Mint block Scott 883 below..


Left stamp measurement taken at 13.3--Right stamp measurement taken at 13.1



Courtesy of and owner of information via Library and Archives Canada.