Optimus 111B

I have a Optimus 111B stove that was given to me that is in very good condition.

It looks like it has never or rarely ever been used.
Is there a way to ID when it was built?
It's value?

Thank you for any information

 

You should light it up and use it. Good stove

 

Per the fuel cap, fairly early. That old, if any fuel had been introduced, the pip will need to be replaced. May need replacing anyway as it will likely be too hard to seal properly.
Duane

 

Optimus 111B with "111B Stamp" and Round Optimus Decal

 

This looks like an early 1960's model, matching an example in my possession. An earlier 1950's model I have has a priming fuel port on the side of the windshield, and a tab at the back where the burner rests, rather than the two-sided clip spot welded onto the base.