This is a single door lock set with 2 swirl edge mold-blown glass knobs containing center rosette inside knob, on original shank, with brass knob stem  trim on both sides . Surfaces are Uncleaned and unpolished as found, but appear to be able to be polished if desired. A few very minor “flea bites” on a few edge areas- no cracks or significant issues with glass.

Glass knobs are both decorated with a less common swirl groove or striated pattern. Center is perfectly clear crystal with imbedded decorative rosettes. There are 3 barely visible moulded marks on outside of glass

Very elegant and decorative look!
Knobs measure approx. 2” across.

Square black lock set “box” measures approx. 3 3/4” tall x 3 ” deep (into door). Strike- plate side is not brass. Appears to be nickel, as used for bathroom doors.
Please ask if you have any questions