1979 D Lincoln cent [ mintmark ]

Hi every one  I need  your  help for this cent isn't mint mark? I need your help please.

Welcome to numista,

please use the same angle of view….

Looks like an RPM (repunched mint mark)to me 

I would call it a ½ filled die…..

You can see the D below that's punched at a different angle the bottom left corner of the D is poking out to me it looks like a D/D/D RPM

Typically an RPM won't have a partially filled center. A filled die would remove part of the D, not fill in the center part. It's a damaged die where part of the center of the D broke off. Nothing special. Bound to happen when you make 2.5 billion of them.