This is a genuine Truth Hardware rear mount, single arm casement operator in the color dark bronze.
See SWISCO product 39-487 for the opposite handed version.
Will provide a full 90 degree window opening.
7-1/2" long arm, measured from wheel center to gear center.
11/32" spline; handle sold separately.
Case is manufactured of high-pressure die-cast zinc; hardened steel drive worm and gear arm with a stainless steel roller.
Finish is electrostatically applied, durable coatings that provide excellent resistance to chipping, scratching and corrosion while maintaining color stability for years in direct sunlight.