Cool and unique. Looks like signed M or N. Estate find, but age unknown. As found. See all photos. Please see photos as they are part of description and I am not an expert.   I am selling similar items and offer combined shipping if you email me before payment.  Please see my other items for fun and vintage finds.    All my items have aged wear, scratches are used and may require cleaning or polishing.  I ONLY SHIP US.