Lovely Studio Art Pottery Vases by DM???

Dear Fellow Collectors,
I have had these for quite a while, as I have given up several times trying to find out what the incised "DM" stands for a potter or studio or both. They are well executed in a beautiful simi-drip glaze, very high quality finish, in a beautiful design and shape. They both remind me of a known potters work, but I am at a loss to connect the dots. They are so beautiful in person.

The taller is 7" x 4 1/4" and the shorter is 6 3/4" x 5 3/4".

Please if you can, help me identify these beautiful vases.