Got these 3 this week. All are worn enough to test my power of imagination, but moving the light around to try to catch the details, I think I have a good guess on the ruler, date and mint marks. Left: Louis XIII, 1617 A (Paris), Double Tournois 20 mm, 2.12 g Right: Louis XVI, 1993 T (Nantes), 12 Deniers, 28 mm, 10.64 g (clipped?) Righthand one is post-Revolution, which narrows it down a lot. Oddly for a copper, the edges look to have been clipped a bit. The edge should be well past the text, but here, the text is almost half gone. France had a lot of inflation in the early years of the Revolution with the whole assignat fiasco, so maybe even copper coins were clipped a bit if they were more valuable than comparable paper money. Below: Austrian Netherlands, 1749, Antwerp (hand mintmark), 22 mm, 3.11 g I think this is the Maria Theresa with the pearl necklace (I can barely see some dots on the neckline for the pearls), which would make it 1749-52. Of those, the third digit looks like a 4 to me, which would narrow it to 1749. Reverse: "AD USUM BELGII AUSTR· 17[??]" Anyway, I don't expect coins like these to have much resale value in this condition, but it's still fun to try and puzzle out what they are. ~$10 for the lot of there, so I didn't have much to lose.
More likely I'm wrong! But tilting it around in hand sometimes I can see details that are hard to see from any individual photo. These are my best guesses.