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I was wondering what the proper term/lingo is for the ruffled type of edge on top of the 3 cent ones?
No special terminology as far as I know. That's just the way selvage looked back then! The ruffled or serrated edges will appear on OPPOSITE sides of the pane (i.e., if you had a corner block, one selvage would be serrated in appearance while the other selvage would be flat). It has to do with how the paper was cut into sheets from the paper roll BEFORE the stamps were printed. After the stamps were printed, then 2/4 panes would be cut from the sheet into the format sold at the post office. I believe the serrated edges are the natural edges of the paper roll.