This appears to be a prize from the second-lowest tier of a Showa-era New Year's lottery postcard, though I haven't been able to confirm it at present. I was storing it with a cover letter indicating it was a gift from the Ministry of Posts and Telecommunications, which existed from 1949 to 2001. I believe this is a very rare item, but there is some discoloration and staining due to age. Please check the images. I would appreciate it if those who understand that it has been stored at home for a long time would consider purchasing it.