This is actually one of those ""asking for a friend" posts; but ran in to this on a Facebook group and am helping a gent out.
Operating of course on the assumption that these are 179s; and from the back, clearly appears to be two horizontal NH strips of three pasted together.
Just asking for some folks with a better eye/experience for your opinion. I suggested he get a cert, as that might help at auction; but also curious for other's opinions. Photos are the best I can do, took them off FB, so they are what they are.