Modifiche

In the following models the logo was simplified by removing the circle, and keeping the "S" surrounded by rays like a sun, in addition the filler button was made in white color to make it more visible. In 1931, driven by competition suffered in previous years, particularly because of the [[Osmia]] and its production of celluloid [[Duofold]] on behalf of the [[Parker]], also [[Soennecken]] began to use this to this material. So the [[Rheingold]] series became available, as well as in the classic black, in blue, green, red and brown, with a luxury model in ''Pearl and Black''. The new celluloid models were available in three sizes, 912, 913 and 916, there was also an economic model with the number 305 andd no logo on the cap, available in black, blue, red, green and marbled pearl-edged blacks , and another economic model marked with the number 406.

In the following models the logo was simplified by removing the circle, and keeping the "S" surrounded by rays like a sun, in addition the filler button was made in white color to make it more visible. In 1931, driven by competition suffered in previous years, particularly because of the [[Osmia]] and its production of celluloid [[Duofold]] on behalf of the [[Parker]], also [[Soennecken]] began to use this to this material. So the [[Rheingold]] series became available, as well as in the classic black, in blue, green, red and brown, with a luxury model in ''Pearl and Black''. The new celluloid models were available in three sizes, 912, 913 and 916, there was also an economic model with the number 305 andd no logo on the cap, available in black, blue, red, green and marbled pearl-edged blacks , and another economic model marked with the number 406.

Nel 1933 la serie [[Rheingold]] venne nuovamente modificata e prodotta in quattro diverse misure; i modelli assunsero i numeri 1911, 1913, 1915 e 1917. Questi vennero affiancati alcuni modelli di seconda fascia, il 306 prodotto nei colori nero, blu e perla, ed il 205, una penna economica, chiamata anche ''Seneca'', ed infine una penna a stilo per il disegno tecnico, siglata come 560A. Nel 1935 venne introdotto il modello di lusso [[Präsident]], con il corpo dotato di una sezione trasparente ed nuovo meccanismo di caricamento a sfiatatoio, usato poi anche sulla [[Rheingold]].

In 1933 the [[Rheingold]] series was restyled and produced in four different sizes; models were given the numbers 1911, 1913, 1915 and 1917. These were joined by a few second-tier models: the 306 produced in black, blue and pearl, and the 205, an economic pen, also called ''Seneca''. Was also produced a stilographic pen for technical drawing, numbered  as 560A. In 1935 was intrduced the luxury model [[Präsident]], with the body equipped with a transparent section and a new filling system, then used also on [[Rheingold]].

Negli stessi anni il sempre maggior successo del nuovo [[caricamento a stantuffo]] spinse anche la [[Soennecken]] ad adottare questo sistema con il modello 1306, realizzato secondo un progetto estremamente robusto in cui il perno ed il dato di fissaggio del pistone erano realizzati in ottone. Nonostante questo le nuove penne della [[Soennecken]] vennero commercializzate ad un prezzo più basso degli equivalenti modelli della [[Montblanc]] e della [[Pelikan]]. Nello stesso periodo venne commercializzato un modello economico per studenti denominato [[Soennecken S4|S4]], chiamata anche ''[[Soennecken S4|Sutterlin]]''.  

Negli stessi anni il sempre maggior successo del nuovo [[caricamento a stantuffo]] spinse anche la [[Soennecken]] ad adottare questo sistema con il modello 1306, realizzato secondo un progetto estremamente robusto in cui il perno ed il dato di fissaggio del pistone erano realizzati in ottone. Nonostante questo le nuove penne della [[Soennecken]] vennero commercializzate ad un prezzo più basso degli equivalenti modelli della [[Montblanc]] e della [[Pelikan]]. Nello stesso periodo venne commercializzato un modello economico per studenti denominato [[Soennecken S4|S4]], chiamata anche ''[[Soennecken S4|Sutterlin]]''.