When we refer to aMAC sticker-ed coin, with just aMAC label, we are talking about a coin that is spotless. For a coin to be spotless it must exhibit surfaces with no spotting anywhere on the coin or 100% spotless free.
A MAC NGC MS-69 has considerably more value and could be worth 10% of the MS-70 value. MAC takes up where CAC leaves off. MAC stickers spotless coins. A MAC sticker could enable you to increase the value of your coins above that stated market existing Price Guides.