What you're seeing is known as Feeder Finger Damage. When the fingers slide the planchet in to be stuck they can sometimes scrape the face of the die and leave striations on the face of of the die. It can happen to the obverse as well as the reverse die faces.
To me it looks like die scratches from a polishing. Keep in mind the die scratches flatten quickly on the open fields on the die, but the scratches inside an area keeps them from flattening as fast. Feeder Finger Damage is usually quite a bit deeper on a die. Sometimes even removing deeper design elements:
This part of the design is not anywhere near as deep on this area on the reverse die. So I feel they are scratches like you would find on a bay of a cent, the remains after the outer open field die scratches are gone.