This tiny mark is incuse 1699-01.jpg And interestingly, this was the only giveaway on my 1700 hopeful no-dot shilling, which had a slight incuse flaw where a stop should be. After stumbling upon a perfect die-match with a partial stop, I concluded that when the clog gets big enough it will bulge and produce an incuse mark on the coin, as it did on mine, leaving also a tiny stress crack, which you'd expect.Interesting point Stu. However, the little dig on my coin is much lower in the field than one would expect to find a stop?