The Saxon III was built in 1871 and 1872 by the Hartmann (66 examples) and the Maschinenfabrik Esslingen (21 examples). Fourteen of the Esslingen engines were subsequently given a Nowotny-Klien bogie instead of the original fixed leading wheels and were then reclassified as the IIIb.
The Reichsbahn only took over one of the unmodified engines - no. 274 BRÜNN and number her as locomotive 34 7611.
Spielhoff, Lothar (1990). Länderbahn-Dampf-Lokomotiven. Band 1: Preußen, Mecklenburg, Oldenburg, Sachsen und Elsaß-Lothringen (in German). Stuttgart: Franckh'sche Verlagshandlung. ISBN3-440-06145-0.[page needed]
Weisbrod, Manfred; Müller, Hans; Petznik, Wolfgang (1976). Dampflokomotiven deutscher Eisenbahnen, Baureihe 01–39 (EFA 1.1) (in German) (3rd ed.). Düsseldorf: Alba Buchverlag. pp. 193–194. ISBN3-87094-081-6.
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