What Was The First Year For The Ink Shutoff Valve?

[DanF]

For Dorics and Coronets?

 

Thanks.

 

Dan

[Wahlnut]

For Dorics and Coronets?

 

Thanks.

 

Dan

 

 

Ink shut-off first shown in catalog of 1935. First shut-off advert 1935 (with beginning of the "2nd Generation "full metal jacket cap lip) Bonus answer...First adjustable nib Advert 1934

Syd

Edited September 21, 2011 by Wahlnut

[simp]

 

Ink shut-off first shown in catalog of 1935. First shut-off advert 1935 (with beginning of the "2nd Generation "full metal jacket cap lip) Bonus answer...First adjustable nib Advert 1934

Syd

Just a doubt about adjustable nib, you say 1934 for advertising, and the patent (US1980159) is filed in 1933 and granted in 1934, but here:

 

http://www.richardspens.com/?page=ref/profiles/doric.htm

 

is told to be introduced in 1932.

 

There are some others sources for that date?

 

Simone