White star line early flag

I have a life ring that I believe to be off the SS Doric (1) that was chartered to the New Zealand Shipping Company. The ring is clearly labelled with the word "Doric" and "Southampton", but also has two flags on it. The first flag is one I believe to represent the White Star Line, it has two horizontal stripes, the top red, the bottom blue, and a white star central to these. The interesting thing is the star has only four points, where as all the images on the internet show either five or six points. The second flag, which I believe dates this to the SS Doric (1), rather than the SS Doric (2) is the Flag of the United Tribes of New Zealand (1834). The current New Zealand flag was adopted in 1902, so since the life ring bears the earlier flag it must date it to the SS Doric (1). I would have liked to put up a picture, but sadly the way that this forum handles picture inserts is not that intuitive and I could not do it. I wonder if anyone can confirm if the first flag is definitely an early flag for the White Star Line, to help confirm my analysis?