John Holm developed Polar Baby (which I grow every year), Polar Beauty (which I didn't care for the 1 year I grew it), Polar Star and I think Polar Gem. I've not heard North Star associated with his name. Quite a mystery this is!
Further info from
http://www.prseeds.ca/catalogue/tomato.php?C=Tomato, which may be where Earl found the above info, since it's there in the same format, is:
CANADA NORTHSTAR is in the Canadian gene bank collection but I have no idea what its origins are. It produces round to slightly oval red fruits, 1" -- 1 1/2" in diameter. The fruit has two locules (seed cavities), thick walls and good flavour.
The North Star I've grown is a bit larger than this.