I don't have reliable information about a specific work titled "Belt 1 (meme) Iii" by Antony Gormley in cast iron in my training data. While Gormley is renowned for his cast iron body form sculptures and has created numerous series exploring the human figure, I cannot provide factual details about this particular artwork without risking inaccuracy. I'd recommend consulting museum collections, the artist's official catalogue raisonné, or Gormley's gallery representation for authoritative information about this work.