Easy to figure out.....

[onamission]

This was found in Pontiac Mi. At Lincoln Jr. High...... It was lost (discarded) in May of 1958. by me.....I was taking printing as one of my classes and when a project was completed and given a grade and the teacher was looking the other way instead of putting all the tiny type away properly, I would throw the whole type setting project!!!! Well several years ago I remembered my mis-deeds and decided to go insearch of the evidence....This is about 13 inches long. I found this and several single type pieces!!!!!

 

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[seger98]

Cool, funny what goes around comes around!

 

[Angelo]

A Pica Ruler.

Mischievous little turd.

Tony

 

[AU24K]

When I used to work in a print shop in the '80s, we called those "line guages".
Scott

 

[Monty]

Who says crime doesn't pay? Monty

 

[crazyjarhead]

Nice. I like that. Never seen one before

 

[greengorilla]

Pica stick. No question.

 

[boomer46901]

I have one of those. I had no idea what is it, and really still don't. Any value?