1977 Kennedy Half Dollar With Really Cool Struck Through Error If Not I'm Still Keeping It

Very cool coin. Struck throughs are incuse. I do not believe this is a struck through. I am leaning towards my first impression which is a result of PMD. There's no telling who, what, or how someone did to this coin, what they did, to make this neat design we are seeing. The impression, exactly at the point of where the raised neck design element joins the field of this coin, is totally unaffected (not distorted) which would have most likely occurred during the striking of this Half if it were a mint error. The cool looking 'thing' (for a lack of better words) is raised off of the surface and was done so by some some type of tool IMHO. It also impregnates the W of WE in a different manner than it appears on the profile of Kennedy. Unless this is a product of a damaged obverse die, which there would be other examples of that have never surfaced to my knowledge, I don't see anything else other than damage after it left the mint.

Very cool. Looks like sewing machine damage

Guessing this must be damage as well.

looks like a small (tiny) chain was pushed into the surface.

There are two types of struck throughs. The first is exactly this. Something enters the striking chamber, the coin is struck, and it leaves an impression (incuse) in the surface of the coin. The other type is a retained struck through. This would be a foreign object struck into the surface of the coin and the object remains there, embedded into the coin. This is seen and commonly known as something like a retained struck through a staple (which has been determined not to be an actual staple but rather a small piece of brush wire resembling a staple). Your coin appears that metal has been "pushed "out of place as previously mentioned. It appears the area in question on your coin has this pushed metal at an upward angel in relation to the surface of your coin. I don't see how this could happen during the strike. The striking of a coin would leave a flat design due to the extreme downward pressure applied by the press. In addition, I don't see your coin having a reeded edge struck through simply due to the size of the damage. The line on your coin is tiny compared to any other denomination of reeded edging that I know of. Hope all this makes sense and sorry to get so long winded.