As of June 26, 1942, only standard (black/black, black/green) 100 were allowed to be produced for the domestic market (Pelikan Schreibgeräte)⁽⁶⁾.

On August 13, 1942, Günter Wagner announced that only the model 100 without metal cap rings were to be produced for the domestic market⁽³⁾ (this was the eighth and last generation of the model 100, and often called "wartime model" by the Pelikan fans). At that time, brass used for cap tube rings was a strategic material. Let alone the nib, the gold was removed from the surface of all the metals. CN nib was no longer plated, and the nickel-plated drop clip was also introduced around this period. Montblanc also made wartime fountain pens without metal cap rings in this period, (Montblanc No. 134).

On March 19, 1943, Deutscher Reichsanzeiger announced that all production of fountain pens and their spare parts would be illegal as of May 1, 1943. At the same time, however, the company received the special instruction from the government that the company should shift their production quota from domestic to foreign destinations⁽⁷⁾. So, it seems that Günther Wagner drastically reduced or stopped the production of the model 100 for the domestic market (Pelikan Schreibgeräte, FountainPen.it).

Note;⁽¹⁾The presence of vent holes is not consistent (GoPens).
⁽²⁾Some pens have no roulette, just like the cap tube of the first generation.
⁽³⁾The CN nibs aside, there seem to exist low quality iridium tips (万年筆おやじの備忘録)(Fig.1-1). My guess is that the restricted use of raw materials made the quality control of osmi-iridium difficult.
⁽⁴⁾Please see Pelikan 100 (ca.1942).
⁽⁵⁾Green transparent acrylic resin piston rod is sometimes seen in the model 100, but, acrylic resin was no longer used in the filling system of the Pelikan fountain pens, as far as I know. 
⁽⁶⁾Presumably, the standard model 100, the standard model 100N, and the economy model Rappen were allowed to produce for the export market.
⁽⁷⁾Because the raw materials needed for military production—such as iron ore, oil, and rubber—had to be imported from abroad, the Nazis imposed strict controls on their limited foreign currency reserves. To secure foreign currency and avoid a trade deficit, exports were promoted in a manner that bordered on compulsion. While export companies were given priority access to raw materials, they were also required to generate foreign currency through exports. The Nazi government and Switzerland maintained particularly close ties, especially with regard to trade (SWI swissinfo.ch).