The early PPS barrel marking had the words Police and Positive on top of each other followed by 38 Special in one line, matching the OP's barrel's appearance.

I'm with DWalt. The comparison of the two photos, as posted by dump1567, shows that the DS billed as original 1928 has a different barrel marking.

Therefore the OP's gun has a cut Police Positive Special barrel, which matches everything else about the gun, except the "eagle" on the medallion. I'd like a close-up not washed out by flash, but a silver-colored eagle would indicate a Sile aftermarket grip.

PS: As -db- suggested, Franzite could be a suspect too; that should be obvious, as all Franzite eagle logos I've seen had the word Franzite clearly stamped in the logo next to the bird.