I am trying to learn the history and information on this pen stamped Hosei. It is a Japanese eyedropper with sealing rod. The barrel is stamped: Hosei / Sanshin & Co.,PT / Tokyo. The nib is stamped: Special / Hosei / Ideal / JIS / 4366. The cap band is stamped: R14K.
I did not see Hosei under the topic: Pen Manufacturers - Current and Past, so does anyone know anything about this pen? Thanks in advance everyone.