Calligraphy Supplies Natural Inkstone Tokyo Shihodo Made [4.5 inch Natural] Rare Item Damaged

Please read my profile before purchasing.
Please examine the images carefully and only consider purchasing if you understand and accept that this is a home-stored item.

☆ Calligraphy Supplies Natural Inkstone Made by Shihodo, Tokyo [4.5 Gohei Natural] Rare Item - With a Defect.

I purchased this over 40 years ago from a calligraphy teacher, but it turned up while I was organizing my closet.

As shown in the second image, the top right corner is slightly chipped.
Since it's an old item, I don't remember if it was like this from the beginning or how it broke.

Even with the chip, you can still grind ink without any problems, so if you understand that this is a used item, please consider purchasing it. (❁ᴗ͈ˬᴗ͈)

I probably only used it a few times.

I checked online, and it seems this company no longer sells inkstones.
It appears to have been a specialty store for calligraphy supplies. How about adding this rare item to your collection?

Calligraphy/Shodo Supplies... Inkstone