Even after the introduction of the piston filler Rappen, the bulb filled version continued to be sold in regions like South Africa.

There exists a bulb filler Rappen that has "IBIS" CN nib instead of "Rappen" nib (Pelikan’s Perch). As CN nibs were introduced in 1939 due to war effort (click), the pen is thought to be a wartime pen⁽¹⁾.

Although the production of the models 100 and 100N were ceased in 1944, the economy model Rappen, regardless of form (both bulb filler or piston filler), were allowed to produce for the export market until discontinuation in 1945 (Pelikan’s Perch)⁽²⁾.

Note;⁽¹⁾Whether the nib was original for the pen or replaced afterwards is not clear.
⁽²⁾License royalty circulation indicated that the Rappen was marketed until the first quarter of 1945 (Pelikan Schreibgeräte). In addition, after WWII, Rappen was no longer mentioned in any catalogs (Pelikan Schreibgeräte), suggesting that the model was discontinued in mid-1945.