House Flags of Nigerian Shipping Companies

White swallowtail with a red St George's cross and a golden crown in the intersection of the arms. My crown is rather stylized because, despite the reduced size of the original picture, it seemed to me that the original crown was also stylized
Jorge Candeias, 13 March 1999

Part of the much larger Yinka Folawiyo Group (interesting logos but no more flags apparently). Quote from above page:

Rapid development in the group's chartering activities and the demand for increased shipping space led, in 1972, to the formation of a new ship owning and operating company, Nigerian Green Lines Ltd (NGL).

From the initial purchase of M/V Ahmadu Tijani in 1973, the company expanded in six short years to become the largest privately-owned shipping company in West Africa with a fleet of six general cargo vessels totalling approximately 88,000 tons dead-weight.

With the adoption of UNCTAD Agreement, NGL was accorded the status of national carrier by the Federal Government.

One of NGL's objectives was to ensure greater participation of indigenous shipping lines in liner conferences and the company is a founding member of the Association of Nigerian Indigenous Shipping Companies.

http://www.yinkafolawiyo.com/greenhome.asp

The flag is horizontally divided green-yellow-green, company initials 'NGL' counterchanged.
Jan Mertens, 9 November 2005

From the the National Maritime Museum:

The house flag of the Nigerian National Line Ltd, Lagos. A green flag with a white letter 'N'. The flag is made of a wool and synthetic fibre bunting. It has a cotton hoist and is machine sewn. A rope and toggle is attached.

Jarig Bakker, 22 August 2004