Leadville, Colorado - A time clock on display at the National Mining Hall of Fame and Museum.

- Image ID: H6YCMB
Leadville, Colorado - A time clock on display at the National Mining Hall of Fame and Museum.
Jim West / Alamy Stock Photo
Image ID: H6YCMB
Leadville, Colorado - A time clock on display at the National Mining Hall of Fame and Museum. The time clock was built by the Dey Time Register Company; it was used at the Yak Tunnel, a tunnel built to keep gold mines from flooding.
Location: Leadville, Colorado USA