this is another lens I have , sorry for the two lots of photos , not sure what happened there , I also have another two gov/military lenses that I have managed to pick up for my camera collection as pictured below.
I was told it was a military lens ( hence the colour) used at ground level up in the northern parts of South Australia when they were doing the TNT explosive tests , but I do not know how accurate that is I will check it to see if there is any "dart marks "as the usual military ones would have , cheers for the reply