Tamron SP 500mm f/8 CF catadioptric (mirror) lens with soft case. This has an adaptall mount with two interchangeable rings to fit Minolta MD and AF mounts.

There is a good review of this lens here:

https://tomscameras.wordpress.com/2016/10/30/tamron-500mm-f-8-55bb-a-short-review-and-some-tips/