




The early white flag bore combined ATR. Brown 1929 assigns it to Bremer Öltransport, apparently operating Atlantic Tank Rhederei; Brown 1934 names John T. Essberger as operator. Brown 1934 and Talbot-Booth 1936 round the A and R differently, with Talbot-Booth naming J.T. Essberger’s tankers.
The E flag appears by Talbot-Booth 1942 with a black letter; in 1944 blue is also allowed. Merchant Ships 1942 gives blue on the funnel and black on the flag. Brown 1971, 1982 and 1995 draw E with very short arms, while other sources use ordinary arms.