

The National Maritime Museum dates its Baltic Steamship flag to about 1955 and gives its dimensions as 1,143 by 1,879.6 mm. LJC also attributes the flag to Baltic Steamship. Rosanoski notes the diamond’s position towards the hoist, as in B551. Brown’s 1926 entry names only A. Coker & Co.
The link from Baltic Steamship to A. Coker is explicitly a Rosanoski contribution. It is not independent evidence for the target operator, which remains unresolved.