@coinclue: Identify yours: https://coinclue.app/?reel=05-1990-no-s-proof-cent&utm_source=tiktok&utm_medium=organic_reel&utm_campaign=whitecard_week2_20261015 1990 penny without an S? Check the strike type first The 1990 No S Lincoln cent error is a PROOF, not an ordinary Philadelphia penny. Look below the date: a normal 1990-S proof has an S; the recognized No S proof lacks it. The genuine comparison photographs in this reel are both 1990 proofs. Ordinary 1990 Philadelphia circulation cents have no mintmark by design, so a missing mintmark on pocket change is not enough. Proof manufacture and authenticity must be professionally confirmed; do not polish or clean the coin. No price, mintage, or guaranteed-value claim is made. Identify both sides with CoinClue — visit the link in our bio. Real coin reference photos with AI-generated narration. App footage shows an EXAMPLE RESULT for a different coin, not an appraisal or authentication of the featured coin. #CoinClue #1990Penny #NoSProof #LincolnCent #CoinCollecting