CD 252 Knowles Patended (Knowles Diamond logo) June 17, 1890. On reverse side: Knowles No 2 Cable. Smooth base. Tiny chip on side of ear. Ping onthe "e" in June. Tiny base chip. Price shipped: $37.00 Looking for wades, ramshorns, Dominion 42 in colors I need and blue glass (electric, cobalts, etc).