Blue glazed ceramic teapot signed

Here is a lovely teapot with a beautiful old blue glaze and pretty lines, featuring a small lid that fits into the opening and an original handle that extends from the body to the top opening. It is signed in relief on the bottom, but I have not yet managed to identify the ceramicist behind the clearly legible signature. It probably dates from the 1960s or 70s and is in perfect condition, with no cracks, chips, or even a nick. It measures 15.5 cm from the spout to the handle, approximately 12 cm in maximum diameter, and 13 cm in height.