Mammy & Pappy Salt & Pepper Shakers Made In Occupied Japan

Hand Painted Blue Mammy and Pappy Salt and Pepper Shakers Made In Occupied Japan Stamped, they are in excellent condition, no chipping or cracking. Some crazing. Both have corks.

I purchased these because of the "Occupied Japan" Stamp but can't find any information except for those without the stamp. I am trying to get more information and a valuation.

Any information is appreciated.

Good