Optimus logo on lamp glass

Hello
Bought a spare glass for my 350 size lamps. The colour of the logo is more greenish than the others I have.
Is it posssible to estimate the age of this one ?
brgds Bjørn

 

These are usually seen on the last of the 1550 model and some of the 1551 lanterns. From memory there is no makers mark on these glasses.

 

Thank you Nils.

So then we are talking about the late 80's and later

 

I would possibly say first in the 90s. I would like to know who the manufacturer was. Could be Asian?

 

Difficult to say Nils.
I bought it from a shop here in Norway that sells military surplus. I reckon it came from some military stock