【Showa Retro】Ceramic Mortar and Pestle Set (Large & Small)

Found in my parents' storage shed. Believed to be old. Originally a set of large, medium, and small... the medium and small showed signs of use and had chips, so only these two in good condition are being listed. It's unclear if these two were ever used.
Please note that on both items, there are areas where the base clay color is visible due to the glaze application (photos 8 and 14). Please understand this before purchasing.

Large: Diameter 26 cm, Height 11.5 cm
Weight: Just over 1 kg
Small: Diameter 15.5 cm, Height 5.9 cm
Weight: 355g

*No maker's mark.
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Set of 2 ceramic round suribachi (grind bowls) with distinctive stripe pattern.

- Color: Brown

Thank you for looking.