Royal Sealy "Heritage" Canister set from Japan

This Heritage canister set (made in Japan) includes the flour, sugar, coffee, butter dish, and salt & pepper set. I have photographed the small chips on the items. The butter dish base has 3 small chips, the salt has 1 and the pepper has 1. The canisters have 2. I have included a close up of the number and name ("Royal Sealy" Heritage). I am guessing the date of production may be 1960 - 1970. If you have any questions, please email me.