It's a modern late 70's - early 90's era Horseman's / Sportsman's knife. My understanding is a company in Germany licensed the Winchester name back then, and had a variety of patterns made up for them. The knives were both domestically produced in Germany, and imported from other countries like Japan.
To my eye, this could be German or Japanese, or a mix of parts from both areas.
Have this moved to Bernard Levine's forum, both he, and a member named Germania have have posted things on the Winchester - Germany connection before.