SHOW AND TELL 141: Ring King W/LOCK, No. 52011, 3.5 inch HD Diskette Storage Case with Lock.

SHOW AND TELL [141]: Ring King W/LOCK, No. 52011, 3.5 inch HD Diskette Storage Case with Lock.

Link to chapter in Wikipedia article on 3.5 inch High Density Disk : https://en.wikipedia.org/wiki/Floppy_disk#3%C2%BD-inch_disk