Welch Spring and Company &quot;Patti&quot; Model Clock from the Opera Series. Named to honor Adeline Patti. Circa 1875. Other similar models were named for , Pauline Lucca, Euphrosyne Parepa - Rosa, Christine Nilsson,and Sofia Scalchi. Other Opera Series clocks include the Judic, the Norma, the Khedive, the Victoria, Capoul, and Eveline, plus the Antique and the Ernani.