The first one is some type of cloth. Like a piece of cleaning rag that was left in the machinery. Or some crazy kind of heavy duty tape. The other two could be damage. The 1960 appears cleaned and worn down, I don't know what is going on the reverse and if it is legit. The color of the 1942 suggests some kind of paint or plating? If there's not a great deal invested you could put the 1942 in acetone and see if the yellow comes off. I think the 1st one is the best one.
As mentioned, the first one appears to have been struck through a material or the cloth of a rag used to wipe the dies. The last photo of the wheat back appears to be struck through grease. The rest are all PMD, IMO. Our error experts: @Fred Weinberg, @paddyman98, and @JCro57 might be able to add more.
Very nice error coins. Struck thru cloth. Struck on planchet delaminated on reverse from 10:00 to 5:00 Struck on planchet apparently delaminated on obverse from 8:00 to 2:00 (I wouldn't mess with that yellow color . . . I actually like it the way it is).
Nice error coins. I agree that 1st is Struck Thru Cloth, most likely a type of abrasive cloth similar to this. Do you have the weights of the other two?
That's interesting about the other 2 coins. I am glad the experts weighed in. The yellow can't be natural, so what is the deal with that? The 1960 I was not sure if the reverse was a vise job or natural. When in doubt, damage.
@Justin Cohen I would be happy to do an up-close examination if you want to send them to me. I can also take some HD photos and email them to you. I don't charge. Just send $10 to mail them back to you. I have plenty of references to vouch for me here on CoinTalk. I think the first two might be genuine. Just can't say for sure about the third. ~Joe Cronin