There was a ballpoint pen attached to the clipboard.
They would write on the dial with a small pen attached to the index; the length of the pen mark would indicate how much time has elapsed.
The analogy of a turtle with a pen attached to its tail is often used.
The results of the player character's actions are written in invisible ink, to be revealed as needed by using the special pen attached to the module.
(A Doodletop, a toy drawing tool that is a pen attached to a top, draws the same sort of path.)
He nodded and held the clipboard out to her with a pen attached.
He handed Romanello a pen attached to what looked to be an electronic clipboard.
These used a moving pen attached to a galvanometer to record telegraph signals.
I waited, leafing through the papers on the clipboard, making an official-looking note with the pen attached by a chain.
There was a cheap pen attached to it by a piece of black string.