Musical score design envelope set, made by Sanrio. - Brand: Sanrio - Contents: 7 envelopes, 8 stickers - Design: Musical score and character illustrations - Country of manufacture: Japan Thank you for viewing. I don't know which character it is. Since it says Sanrio, I think it's Sanrio, but I think it's very rare. This item is 37 years old. It is unopened, but there is no guarantee of the contents' condition. Showa Retro Collection Vintage Sanrio Sanrio Characters Rare Valuable Envelope Letter Set Sticker