From Junior English Activities Book Three by Hatfield, Lewis, Besig & Borchers (undated, c. 1938).

A clock with an escapement mechanism which occasionally free-ran, as though lost in thought.  From Jizz: The Story of a New Renaissance Man and the Riddle of Existence by John Hart, 1992.

From King Time by Percy Keese Fitzhugh, 1908. 

From Elon College's 1974 yearbook.

Hands-free clock faces fly through the air on their way toward installation at Penn State's Old Main bell tower. 

From The Book of Shadows by Don Paterson, 2005.

It's rare to see a 4-year grandfather clock.  This one goes from 1940 to 1943.  From Pennsylvania College for Women's 1941 yearbook.

From Fort Wayne Bible College's 1979 yearbook.

From The Gateway, 1981.

From Using Our Language, Grade VIII by T. I. Davis, 1961.

Temporal anomaly investogator Nick Normal spotted this weirdness at the Paramount Building, Times Square, New York.  Note that although both clocks sport stars for numbers, the clock on the right has an inverted pentagram at the 12:00 position, while the clock on the left does not.  The two clocks therefore should hardly be expected to keep the same time.

Happy hour as marked on the clockface of a beer can.  From Tri-State College's 1980 yearbook.

From James Millikin University's 1919 yearbook.

From Piedmont College's 1958 yearbook.

From Valparaiso University's 1953 yearbook.

Temporal anomaly investigator Patrick Rohe discovered that the UF filter on his camera could reveal clock face weirdness.  Note that the ghostly clock faces are rotated, with 12 o'clock at the bottom.  This clock tower is at Towson University, Maryland.

From Colorado College's 1917 yearbook.

From The Book of Shadows by Don Paterson, 2005.

Utterly marvelous: temporal anomaly investigator Eight Cent snapped this photo at noon of a clock at the National Zoo in Washington D.C.  However, checking his camera's EXIF data, he discovered that it precisely matched the incorrect clock.  He then checked the time setting on the camera, which happened to be off by 6 hours and 40 minutes, precisely as the clock tower was off.  This is a perfect and spine-tingling example of how a rift in the fabric of space-time can affect all the chronographs in the vicinity.

Swinging on a pendulum with the imp of three o'clock.  From King Time by Percy Keese Fitzhugh, 1908.