u/Funny_Produce_6510

Have had this painting for over 40 years. 30 years ago, a curator in NY said it was one of the finest pieces he had seen and referred me to the head of the art department at Rutgers but I didn’t get around to it as I moved across the country. No visible signature, it could possibly be hiding behind the frame. As you can see from the back of the frame it is very old. Anyone have any ideas of artist/period? Please and thanks.