Oversized # 178

This stamp jumped out at me because the blank is oversized. The image is the correct size. Is this something other than a #178?

Just a jumbo, with a nice plate scratch in the top margin. Probably from the left pane, but that's just a guess.

Nice Jumbo! Larger margins sometimes resulted due to line perforation methods. Due to the extra eye-appeal, these are often more desirable to collectors.

The jumbos of the Bank Note era were not an alignment problem, they were intentional. The stamp printers set the perfs for a bit of extra size around the outside positions of the entire plate. Normally the outside stamps should have extra margin on one side only (top, bottom, left, right) or two side for the corners. But sometimes the positioning of the sheet was such that corner jumbos wound up perfectly centered.

Thanks to all for the information. I had seen listing for "Jumbos" but just thought that was a quality thing not a size differential.

What essayk said. If you line your two stamps up at the right, you'll see that all the extra size is from on left.