Beautiful heavy vintage BLENKO 641L large 12" ribbed textured green glass centerpiece/console bowl (sometimes called a coffee table bowl at the time). Circa 1964-66 (it first appears in their catalogue in 1964 and doesn't appear in their catalogue after 1966). They also made a smaller version, 641S.
Measures 12" diameter x 2 3/4" high. No cracks, chips or breaks.
Please examine the pictures carefully, as they are an important part of the description.
Thank you and please let me know if you have any questions!