While researching the local Macy’s recent 50th anniversary, I stumbled across a curious fact: a huge, artistically significant mural went missing from the store.The mural, commissioned by Macy’s especially for the Stockton store, was painted by a renowned Bay Area watercolorist named Kenneth Potter (1926-2011).Depicting Stockton history, the mural stretched 38½ feet along the ground floor east wall.