After a cursory Super Search for obfus with "clock" or "time" or "tick" or "tock" in the title, What time is it?, found by tye above, looks the closest fit to your description that I could see.

If you're interested in other time-based obfus, you might enjoy:

If you're interested in historic obfus see:

Update: Yay, Schmunzie eventually found it:

In reply to Re: Are old obfus gone forever? by eyepopslikeamosquito
in thread Are old obfus gone forever? by Schmunzie

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