Vintage Original Nude Woman Charcoal Drawing 1969

Vintage original charcoal drawing featuring a topless woman in a robe or shawl. Bold confident shading and lines, great use of light and depth, signed at bottom right, but I haven't been able to identify the signature, dated 1969. Really lovely unique piece! Several tears near edges as shown, and small holes at each corner from former adhesive, please see pictures. Measures about 24.5" x 36.5". Will be shipped carefully rolled in a sturdy tube. The black metal frame shown in pictures is not included, but I'm happy to offer it for the cost of shipping; feel free to message me if you're interested and I can update the listing. I always pack carefully and ship out by next business day!