SOCIÉTÉ COMMERCIALE BULGARE DE NAVIGATION À VAPEUR.
image by Jarig Bakker, None
The flag is quartered per saltire: green above, red below, and white at hoist and fly. It appears on a postcard and in Lloyds 1912 and Talbot-Booth publications of 1937–1944.
An alternative funnel is shown in a black-and-white photograph of Varna in Merchant Ships 1942.