The TEXACO North Dakota was a "fill up" premium offered by Texaco service stations (remember those?) in 1961. For a tank full of gas you could purchase the ship for $2.89. It came in a box with a booklet explaining underway life on the tankers trip from Galvaston, Texas to Providence, RI. The second part of the booklet told of the wartime story of the oil tanker OHIO that survived numerous German attacks attempting to bring aviation fuel to Malta in WWII.
For an additional $1.00 you could send away for a plastic display stand ( same length as the model) that came with a nameplate with all the ship's specs on it.
I purchased a number of tankers from Evil bay, some were basket cases but cheap. I put each one through a "re-hab" process, new parts, new motors, new decals and a new paint job. The superstructures white plastic turned yellow over time and a coat of fresh paint made the model look brand new. Wen-Mac offered their own tanker labeled "the SS DOLPHIN", same as the gas station model but without any connection to Texaco.
By the way, some of the Texaco tankers had the "brown" bottom paint, some had a "red" bottom paint, I have examples of both.