HERE IS A VINTAGE 6 1/2" FIELD COIL SPEAKER. MADE BY RADIO SPEAKER CORP. MFG AND DATE CODE IS 277609. GUESSING 1946 VINTAGE. 1000 OHM FIELD COIL. 4 OHM VOICE COIL. NEAR PERFECT CONDITION. DAMAGE FREE CONE AND CLEAN BASKET. HAS A SINGLE ENDED OUTPUT TRANSFORMER ATTACHED. PROBABLY 6K6GT OR 6V6GT SE. NICE SPEAKER. BUYER PAYS SHIPPING.