Birkenstock Papillio silver metallic sandals size 35

Birkenstock Papillio Size 35 (Ladies' 4) I can't tell if the footprint is filled and worn off or unfilled. Silver metallic design. Preloved with normal wear. There's patina on the footbed and some of the tread. The buckles have left markings on the leather. There's some other markings on the L shoe I was unable to get off.