This is a tough one. It's unsigned.

I think it's a silkscreen on board, about 60 X 75 cm.

No signature - there's a label on the back from Richardson Bros. in Winnipeg - a relatively high end art gallery from the early to mid 1900's. A few other markings but nothing that identifies the artist.

I've had it out of the frame, nothing else on the edges that helps.

I think it's a cool abstract print, great frame too.

 

Is that a signature, lower center on the green area?

 

I've attached closeups of those two areas. If either of them is a signature, it's pretty indistinct.