Vintage appraisal

[lindac]

Just wondering if anyone can offer some insight on a vintage bottle of Japanese Plum Gekkeikan wine I recently came across? Here's what I know. Produced & bottled by Okura Shuzo Co., LTD. Established: 1637. 247 Minamihama-cho Fushimi-ku, Kyoto, Japan. Owner was a women in her 90's and the label and attached hanging tag looks no earlier than the 60's or 70's. Oh, it's also unopened. Hope someone can help!