American School Modernist Landscape signed with monogram”Moon and Mountain “ 1919

[unattributed]
American School
Moon and Mountain, 1939
Watercolor on paper
? x ? inches
Turtle monogram at lower right.  Dated at upper left.  ’39”.  Lower left in pencil ‘8×5 308?’.

[unattributed]
American School
Moon and Mountain, 1919
Watercolor on paper
6 x 4 inches
Turtle monogram at lower right.  Dated at upper left

Lower left in pencil ‘8×5 308?’.

Period frame.