I received it in a batch of darkroom stuff. It says Astragon 1:4.5 f=180mm. It is mounted on a lens board measuring 5" by about 6 3/4". I have no use for such a lens and have researched it with plans to sell it, looks like it may have been made by Fuji, though I am not sure. Pictures are attached.. anyone have an idea.. or better yet.. anyone want to buy it? Thanks.