AUTO VIVITAR TELEPHOTO 135/2.5 with Vivitar TX adapter for Pentax
The T-4 family are lenses with interchangeable mounts. T-4 mount adapters for most common camera mounting types were available. This family of lenses has only slight cosmetic differences from the T-4 lenses marketed by Soligor at the same time, and which were made by the same manufacturer. Tokina is believed to be the manufacturer. Marketed ca 1969.
The mount adapter has the signs P/K. As far as I know this means adapter for Pentax
The lens and the adapter are not tested. But they look from outside good and the adapter is easy fitted at the lens. The lens looks clean and there is an built in sun shade. Front and backside lens.