The firm of Mercado & Seully was located in SanFrancisco. It was listed in the city directory as dealing in Sausevain's wines and bitters from 1862 to 1867, then for another three years as dealing in California wines and grape brandies. Their product, Sausevain's Bitters, was most likely a refreshing alcoholic drink. 102,850 private die stamps were issued to Mercado & Seully from March 11, 1867 to October, 1868. All were printed on old paper.