Vintage Albert Einstein Etch, Black and white original artist signed square

...portrait drawing wall art A vintage portrait etch of Albert Einstein, in a smaller square format. The size is 5 x 5-1/8 inches on the image square. It comes with the matting board and backing board for protection, but is unframed otherwise. Size 12 x 12 inches (30.6 x 30.6 cm). Signed open edition, I could not make out the artist signature. It looks like they may have worked from a publicly available image of Einstein, smoking a pipe - and leaving the pipe out creating this endearing, almost homely portrait of the world famous theoretical physicist.