...is the second version of the electric Polaris (thus, Polaris 2) made, I think c. 1965. I believe they made a total of about 1,000, all of them in 14K. About 200 of those were white gold, so it's not surprising you aren't familiar with this model, I don't think they show up very often. I chose it for the photo for its size since anything larger would have overpowered the coins.