This is a Vintage Zippo Lighter, the smaller model. Has a Pat date 2517191.. The 1950's. This is a use lighter. Has Advertising on the front side.
Lefere Forgings Since 1929 has a picture what looks like some king of Gear. and has Jackson Michigan on it. Has no writings on the back side.
In nice used condition, Would look nice in any Zippo Collection. It is 2 2/8" high, 1 1/8" wide and 4/8" Depth.