Clean a tarnished 1990 Kookaburra?

收藏幣唔可以清理, 會減收藏價值 !

舊版笑翠鳥的深色邊圈, 是正貨的保正 !

forums.silverstackers.com

it would ruin any collector value and NO - DONT CLEAN IT!!!!

Do not clean Perth mint coin's, ever

1990 Kooks weren't restruck - the full run of 300,000 were minted that year. Presumably there's been substantial population shrinkage over the years. I would never clean a 1990 Kook. Even toned they still attract very good premiums over spot - and because of the capsule lack of seal, i reckon 99% would have significant edge toning. Key date for a collection.