Old Bonsai Pot, Round Pot, Small Size, 4 Items

Bonsai Pots - Round Pots - Small Pots - Set of 4

Bonsai and gardening were one of my late father's hobbies. The pots, ranging from small to very large, have been left out in the elements in a corner of the garden for many years.
I am listing the ones that seem suitable for sale as part of decluttering.

They have been washed, but please understand that there may be dirt and stains due to age before considering your purchase.

On the back of the pot in photo 8, there is a mark that appears to be blackened, which I believe was there from the beginning.

Dimensions:
Photo 2: Outer diameter approx. 15 cm, Inner diameter approx. 12 cm, Height approx. 6 cm (with mark)
Photo 4: Outer diameter approx. 15.5 cm, Inner diameter approx. 13 cm, Height approx. 6 cm
Photo 6: Outer diameter approx. 17 cm, Height approx. 5 cm
Photo 8: Outer diameter approx. 15 cm, Inner diameter approx. 13.5 cm, Height approx. 6 cm (with mark)

I have absolutely no knowledge of bonsai, gardening, or pots, so I cannot provide any further details.

Thank you for looking.