canvas questions authenticity saying by utrillo, or is this common in his originals?
http://img801.imageshack.us/img801/8976/gatx.jpg

closeup
http://img547.imageshack.us/img547/992/ufnw.jpg

my grandfather has owned this painting for many years and is curious if its authentic, when observed up close the painting has visual depth in the brush strokes, not a flat surface.

http://imageshack.us/a/img835/7203/nbc3.jpg