House Flags of Hong Kong Shipping Companies 1

Blue flag with a vertical red rectangle in the middle and the letters A B C placed horizontally in the middle, B being in the red rectangle.

Source: Josef Nüsse
Ivan Sache, 25 August 2002

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My impression of the flag in Josef's site is that the blue is darker. The company is a P&O subsidiary so that a shade of royal blue seems likely.
Neale Rosanoski, 23 January 2003

Blue flag with a white symbol in the middle. The symbol is basically made of a white ring divided by a white cross. Parts of the ring are omitted.

Source: Josef Nüsse
Ivan Sache, 25 August 2002