HeroesofHorology.com

400-Day Clock Gallery

Clocks from all over

Kundo Kieninger & Obergfell Anniversary Clock More Info

1863 Vintage Elgin German S Haller Anniversary Clock More Info

1951 Kundo Kieninger & Obergfell West Germany More Info

1911 Gustav Becker 400 Day Anniversary Clock More Info

Endura S. Haller Simonswald 400 Day Anniversary Clock More Info

Jahresuhrenfabrik Schatz 49 400 Day Anniversary Clock More Info

Jahresuhrenfabrik 400 day anniversary Clock More Info

Kienzle 400 Day Anniversary Miniature Clock More Info

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Charles O Terwilliger, Jr.

Charles Terwilliger’s contribution to horology can best be described as innovative and colorful. Not only did he revolutionize the accuracy of the 400-Day Clock, his research and clock reproductions continue to impact the world of clock collecting to this day.

HeroesofHorology.com was established in 2025 to honor the memory of Charles O Terwilliger, Jr and the company he established, Horolovar, and to fulfill the dream of his son, Robert Terwilliger, who wished for this biography to continue on after he himself passed away.