How to Check the Authenticity of a Howard Miller Clock

Howard Miller J.H. Gould and Co. III Vintage Wall Clock - Brass Pendulum, Quiet Quartz Movement, Antique Brass Finished Bezel, Decorative Timepiece for Living Room, Kitchen & Office

Howard Miller Thomas Tompion Mantel Clock – Classic Key Wound Mantel Clock with Triple Chime, Wooden Finish, Brass Dial, English Inspired Design & Dual Ratchet Winding Arbor Quality Home Decor

Howard MillerSand Beach Mantel Clock 547-612 – Oak Yorkshire with Quartz & Dual-Chime Movement

Howard Miller Statesboro Mantel Clock - Classic Wooden Analog Tabletop Timepiece with Quartz Movement, Wooden Finish, Battery Operated Desk Clock for Shelf, Living Room, Bedroom, and Fireplace Decor

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Howard Miller Emmett Wall Clock II, Espresso Finish - Silver Finished Pendulum, Wenge Style Chrome Accents, Quartz Movement Soft Ticking Wall Clock for Bedroom, Modern Grandfather Clock