Beautiful, NOS Open Box Gemko 43.5mm UV screw on filter - unused, in all original packaging. This filter is perfect for several varieties of Olympus film cameras such as the Trip 35 or the Pen EE series point and shoot/zone focus camera. Likely others, but please do your own research. 43.5mm is a filter thread size that is hard to find these days. Filter made in Japan. Thanks for looking.