@ T.I.F. Thanks for the cleaning tip. I think that it worked a treat (over several days). (Quick question: Do you have to 'neutralize' the coin when using Lemon juice/Vinegar/Windex on 'silver' coins or will Dem. Water suffice?) The reverse legend confirms my attribution of: LYDIA Sardes Ae c.133 B.C. Obv. Veiled and turreted bust of Tyche facing right, Rev. Zeus Lydios, standing left holding sceptre and eagle. Control monogram in left field and ΣΑΡΔΙΑΝΩΝ in right field. SNG Cop. 463 (Before) (After)
Sorry, TC-- I just saw your results post. Nice work!! Yes, I do recommend being cautious and neutralizing any remaining acid regardless of metal since we don't know the exact alloy for any given coin. Sodium bicarbonate dissolved in water should be fine.