Here's the O'Halloran from the same auction. At first I was thinking that there was a sheet of these that got pulled off the printer. But, unless there was space set in between each card, which I don't believe I've ever seen on a panel or strip of cards before, that couldn't be the case for the OHalloran or Cantwell. So it would have to be some sort of an advertisement perhaps?
Generally speaking, when cards are laid out in a panel or strip, there's only enough room to the left and right of each photo for that card's border. So, in theory, if the Cantwell/OHalloran were cut from a panel, you wouldn't see any white around the edges.
I suppose you could make the argument that the OHalloran was the upper-left card in a panel, but even that is unlikely because we can see the rounded corners. So I think I'd have to go with advertising piece for the two Series 7s....
T210Ohalloran.jpg