This is a large Seeman Sub dive bag which was bought in the 1990s, used for about a year to store dive equipment and hasn't been used since.

The bag measures about 66x27x32cm and is big enough to store your dive equipment. It also has two side pocket for odds and ends and a long pocket along outside the bag for your fins. The bag is in a good condition with working zips, and a carry handle. There are some white marks on the bottom which can be seen in the photo.