The man seeks to purchase a potato clock because he was told to "get up at eight o'clock", a faint homophone of " get a potato clock".
This has been cited in print since at least 1842.
Since at least the 1990s, the "potato clock" joke has been tied to employment situation, where a boss tells a worker to "get up at eight o'clock" and the worker seeks to get a potato clock.
Source: www.barrypopik.com
Edited on March 23, 2022, 2:12 am