Dha for comment

[JeffS]

Any thoughts on what was set in the two round depressions on the scabbard foot? There is a gummy resin at the bottom that was likely the adhesive used. One of these has shiny foil-like residue stuck to the resin.
Incidentally I found another example of this scabbard style on Ashoka Arts website.

[SidJ]

Those depressions contained circular raised metal button like fixtures.