Austrian miniature enameled Sterling silver clock

Pricing & History
Austrian miniature enameled Sterling silver clock having deep blue guilloche surfaces set within a silver case. Key-wound bar movement. Case marked with Diana head mark, "925", maker's mark "RS". Provenance: Estate of Mrs. W.A. "Betty" Criswell, Dallas, TX. 6.5"H x 4"W x 1"D Circa - 1886 - 1922.