Tupperware Snack-Store Plastic Container + Lid

Tupperware Snack-Store Plastic Container + Lid Cover Vintage 1960s It's approximately a 9 1/2" square I think the part number on the lid looks like 515-3 (next to last photo) and the number on the container itself is hard to read - maybe 514-2 - but I'm not sure (see last photo) I've had this since I bought it at a Tupperware house party back in the early 1960's along with many other items. It's in good vintage condition as far as doing its job very well although it does have surface wear/use