Weems & Plath Endurance 085 Brass Clock This Endurance clock has a maintenance-free, ultra-hard brass finish guaranteed to never tarnish. Its patented Slide-N-Lock mounting system eliminates the need for visible mounting screws and allows for easy removal for adjustments and battery replacement. This Endurance clock, as well as the many other instruments in the collection, is weatherproof and designed for outdoor use. Beveled glass crystal O-Ring seated behind glass for weatherproof construction N battery included Lifetime warranty on finish and movement United States Patent #8,925,381 Weight: 0.65 lb.