To head off the inevitable rehashing of "double impression" vs. "kiss impression", yes I get it, but this is what the marketplace and catalogues consider to be a double impression. Deal with it.

Anyhoo... I've seen this numerous times as singles, but this is the first block I've seen, MNH to boot. The secondary impression is not as bold as other examples I've seen, but the distance between the two is greater than typically seen.
There's the faintest trace of a magenta cancel along the very right edge of the right 2 stamps, so presumably these were precanceled.
