Here's a good example of what perf 10
would look like... you can see how much
larger the perfs are... and if you count
point to point at the top, you'll see
there's exactly 10 perf holes...
http://www.ebay.com/itm/USA-424-MNH...em20eb0af88fYour stamp appears to be a 498e right side
pane stamp... look at these...
http://www.ebay.com/sch/i.html?_odk...&_sacat=3461