



The website dates use of this flag to 1849–1916 and 1930–61.
Stewart and US Navy show conventional star shapes with horizontal arms. Stewart assigns P221 to Pacific, Argentine & Brazil Line. Jordan’s black funnel with an emblem on a white band is presumed to represent the same design.
The flag follows a National Maritime Museum example dated about 1951 and measuring 1193.8 by 1752.6 mm.