1937-D 3 leg EF45 shiny lines

Soldi

Below headdress all around periphery and 4 to 6 o clock. I've never seen this before.
I've owned 55s without these lines.
Americana rare coin site and enlarge photo will show more clearly.
It's as if someone did this afterwards and not during mint process. TY Michael

crazyhounddog

This particular coin was struck with fatigued dies. I believe what you’re seeing is the hot flow of the alloy being pushed into place from overused dies. Because the dies are compromised from overuse it will create friction which makes the nickel hot, thus you will see flow lines, especially around the rim.

Soldi

This particular coin was struck with fatigued dies. I believe what you’re seeing is the hot flow of the alloy being pushed into place from overused dies.

Thank you Crazy Cane that is one heck of a good answer. I appreciate it.

Bikergeek

That is pretty common with capped bust half dimes. The description of this 1834 LM-2 by the authors of "Federal Half Dimes 1792-1837" includes the sentence: "Die flow lines form in front of mouth and chin." I think they appear bright because on a circulated coin the higher ridges are subject to rub, while the low valleys can retain some luster.