Diamond Co Ltd Celluloid Pen

[IanSims]

Hi,

 

I was wondering whether anyone could have help me ID the date of this pen. It has Diamond Dia Co Ltd on the shaft and a 300Yen paper pen price around the cap. When I purchased it I thought it was from the 1950s but as there is a current company in Japan with this name I guess it may be modern. I wondered if anyone had any ideas?

 

Thank you

Ian

 

 

 

 

 

 

 

[AltecGreen]

1950's. The nib has the JIS mark so 1955 or later.

 

BTW- the 300¥ price should have been a give away.

[IanSims]

Thanks. Is the JIS the circle on the nib?

[AltecGreen]

Thanks. Is the JIS the circle on the nib?

Yes.

 

Normally, it can be dangerous to date using only the nib because nibs can be swapped. But since the pen has a sticker, the pen is most likely NOS and has the correct nib. The trick to getting these to work is that the cork seal on the shut-off valve is usually bad even on NOS pens. This will have to be replaced (non-trivial) or the pen modified before you can use it.

[IanSims]

Thanks. I will use it as a dip pen which is what I am doing with some with perished sacs.