Montblanc fountain pens with nibs with letters in triangle

[kryj]

Hello,

 

in Montblanc fountain pens from 30's especially cheaper there are some times nibs with Warranted 14 Kar stamped and letters a, b or c in triangle. Can someone told me something about these nibs? Were these nibs made by Montblanc?(*) Why were they used instead of normal MB nibs?

I also noticed that letters are correlated with pen size. It means that smaller pens have a, bigger b and the biggest c.

 

Examples of these nibs from fountainpen.de:

 

*BTW Has MB always made its nibs by itself or it has sometimes commissioned nib production to other companies?

 

Regards

kryj

[Tashi_Tsering]

I have Montblanc Safety pen no. 302 (1935-37) with “a” nib on it. 
 

The “Collectible Stars” book states that these nibs were produced from 1932 to 1937.

That's all the information I have.

 

[niksch]

Agree with the above post.  According to Roesler in The Montblanc Diary & Collector's Guide, these nibs were produced in the years 1932 thru 1937 specifically for the III Series and have letters A, B, and C.