Vintage glazed art pottery envelope shaped vase -geometric pattern-Modernist-MCM

Unusual, envelope shaped vase is in excellent condition. It measures 8 1/4 " tall and 7 3/4" wide at the top. Piece weighs just under 3 pounds. Pattern is varied shades of browns, beiges, blues and red. Glazed outside and inside. This is a stunning piece, well made and well designed. Unfortunately we cannot identify the mark underneath. If you know the artist or studio, please let us know!!! Estate items are not new and aging and wear should be expected. Please look at all the photographs and read all descriptions carefully.