NFLD Scott #134 - Catalogue Perforation Discrepancy.

Hi guys...Was looking at this Scott #134 stamp from Newfoundland...There are many different perforation identifications in Unitrade and N.S.S.C.(Newfoundland Specialized Stamp Catalogue)



Unitrade show perforations as..
14.0 x 14.0
13.5 x 14.0
13.8 x 14.0
13.7 x 14.0

N.S.S.C. show perforations as..
14.0 x 14.0

Here is my stamp..Perforations are..
14.2 x 13.85

Wish I had more of them to find out how many non catalogue perforations actually exist.

See perforations below..

It looks like the catalogue probably uses the numbers on the left on the perforation gauge which is divided to the nearest half whereas specialists would use the numbers on the right which is divided to the nearest tenth.

Not sure about this, but Jogil might be on to something.

On the other hand, there are too many subtle things here--lots of perf varieties exist as you surmise but also the factors of time, removal, shrinking or expanding seems like quantum mechanics in its full glory. Probably explains why Walsh and Butts just went with one "close to the hole" listing.

I would admit though that its a field of study ripe for someone to dive into the granularity

Not sure about that..These people identifying perfs would make sure the correct method is implemented...There are professionals..

Robert