Art Deco OTIS Sterling Silver Rhinestone Screw Back Earrings

These screw-back earrings are marked Sterling on the stem and OTIS on the rim. They feature clear stones or rhinestones in a geometric or Deco style design. They are about 11/16 or 17.5 mm in diameter. The screw clips work fine. They probably date to the 1930s to 1950s. Otis, Inc. was a Rhode Island jewelry company in business between 1934 (often incorrectly listed as 1943) and 1970.