1985 wagon, stranded at work... starter?

[ngarover]

Odd issue, at least for me, car seemed to turn over a little slower this morning, but started fine, drove my usual hour to work, no issues, headlights everything fine.. got out of work and when I tried to start it dragged like the battery was dead... Pulled out voltage meter, and 13.9 volts on old battery... then only the glow plugs would light and it would not turn over at all...

Ran over to auto parts, bought a new battery and installed it, same.

It's like the starter failed, but I have never seen one just give out like this without any real warning. Anyways, had to finally leave the car and will have it towed home tomorrow and see if swapping out the starter is the issue.