1983D 1C occuladed gas bubbled mintmark

[Shleppodella1]

Here's a good example of a occuladed gas bubbled mintmark with some plate splitting that could be mistaken for an RPM that is very common on post 1982 copper cents due to the zinc/copper. Even though it does look like the air pressure leaked out of it like a tire.

[MintErrors]

I agree, its split copper plating. It is pretty common to see on the date, mint mark and IGWT.

[Shleppodella1]

Hey I'm learning.