Pair of Signed Studio Pottery Mugs Cups Beige/Blue/Black Handmade Vtg OOAK SP

Very unique pair of studio pottery mugs or cups. They are signed at the base but I wasn’t able to identify the maker. There is also a stamp/mark under the handle that looks like a flower or a sun. They’re well made and one of a kind. They are in good condition and have wear consistent with age and use of the items. Please look carefully at the pictures, they’re part of the description. Measurements in centimeters on the pictures.