Every time I think I have seen all the variations of Sterling Plastic pencils boxes or cases, I find one I have never seen before. Here it is, a Sterling Plastic Pencil Care model 633 from around 1967. This case is in great shape and all the parts are there. There are three games that can be played on the top of the case by using the little pieces on the right. I have added so many more Sterling Plastic school and office supplies to my collection this past year that it may be time to lay it all out on the table. Add this case to your collection.