Sixth International Pilatalic Exibition 5c Stamp

Anyone have any info on this stamp? Was on the back of some pstcard backing. I found similar stamps with perfs but nothing like this mis-shapen perfless look

Cut from a souvenir sheet.
Don

SIPEX 1966

Assuming they were cut off souveneir sheets, what I find odd about them is that they are all shaped exactly the same the same. The distance on the left vertical edges are the same to each other as the right vertical edges are as well, but the right side vertical is taller than the left (by the same amount on each one. The horizontal distance is identical on top and bottom of each one. Each of the horizontal edges flare up or down at exactly the same point too.

I am not sure, but assuming they somehow "cookie cuttered" these up off a sheet, would sheets have backings of gum so they could be adhered to mass mailers or other media. (on the flip side of the cardstock it is some kind of announcement that something scheduled in Norwood MA was being moved to a place in Dedham Ma)

Very weird.

I guess the cruxt of my inquiry is are these desirable? I also found 2 more (not cookie cuttered like those 3) that were "Cancelled" Jun 23 but I cant make out the year.)

14.68 million souvenir sheets were printed so mutilated portions of sheets have no value. The Scott value for the entire MNH sheet is the minimum of 25 cents.

Some stacked three sheets one on top of the other and then cut them. So they all look alike.

Yes, these souvenir sheets had water-activated gum.



Gentle request. When asking about something, please show the entire item, front and back. You might be surprised what the SFC readers might know about what you have. From your initial image, one can't really tell if your stamps are loose or adhered to something. If it took 3 of these to mail a postcard, then this is during the 1988-1991 era and would seem to be a use of "discount postage".



which is a very large quantity for a souvenir philatelic item. Also, the survival rate is extremely high since the vast majority would have been bought by collectors.

As an aside, here is the bulletin board flier announcing the issue:


The paper band from around a pack of the sheets:


A 1966 double-weight cover likely containing tickets, which appears far less philatelic than most uses:


Portion of a sheet used between collectors in 1970 after the card rate had increased to 5 cents in 1968.