SOLVED: Mystery (to me) Starrett Tool

[searman]

My grandfather was a machinist who retired in the early 1970s and passed away in the mid 1990s. I didn't have much interest in his profession back then, but that has changed since I retired. A couple of days ago at my dad's house, I ran across the Starrett tool in the photos below. It is clearly stamped around the head with Starrett's basic information, but I did not see a product number. It's about the size of a center punch, but it appears to be some kind of telescoping device. The part that I think should telescope seems to be seized. I am confident someone here can identify this tool. TIA!

 

[s3zau]

Try to take the seized part out , you wil find a point on the other side.
mount back around and you have a scriber.
it’s removable, so it’s safe to keep in your pocket

 

[s3zau]

Try to take the seized part out , you wil find a point on the other side.
mount back around and you have a scriber

 

[searman]

How cool! I'll see if I can get it pulled out.

 

[Rinspeed]

I have one of those somewhere, love my Starrett tools.

 

[searman]

Yep! I I threw a pair of jaw guards on my vise, placed the body in a nook inside the guards, and used vise grips to pull on the stub that was sticking out from the body.

And here it is disassembled!

I used CLP to clean the point and sprayed some inside the body. Thanks @s3zau for making my day!

If I had to guess, I'd say mine is the Model 70A.

 

[isb cornbinder]

Try to take the seized part out , you wil find a point on the other side.
mount back around and you have a scriber

I bought a toolbox filled with quality tools. One of those Starrett scribers was in the mix. Now I know how it works. Thanx

 

[RTM]

They are a wonderful tool. But be cautious even in the safe mode the knurling on the sides is deep enough to scratch the **** out of things in your pocket like a cell phone screen. DAMHIKT