I occasionally had shipping line cap badges through my hands when I was dealing. Very hard to get hold of and always made good money. The standard MN badge was quite common, as you might imagine. I have about 80 odd different shipping line buttons - most representing lines which have long gone. Almost all of excellent quality, and normally gilded to resist salt water corrosion. Incidentally KING6024 I have both Trinity House and NZSCco buttons