Here is a VIVITAR 35 mm camera  converter as shown. This is from a local estate. This weighs 5.6 oz total. The case has a torn strap as shown. I see no flaws on the converter. This will make a nice addition to your collection. Please see pictures and ask questions. I will combine shipping. I usually ship the next day after payment 5 days a week. I am guessing about the mount style.