It should be clarified, if Koechlin works in Belfort merged as well with Grafenstaden in 1872. The article suggests, that Elsässischen Maschinenbau-Gesellschaft Grafenstaden was a separate factory from Société Alsacienne de Constructions Mécaniques until 1919. On the other hand, German book on locomotives calls Belfort works a branch of Grafenstaden already in 1880s - and it is known, that both manufacturers were at least closely tied and built de Glehn's locomotives. Possibly all works (Mulhouse, Belfort and Grafenstaden) merged in 1872 and
Elsässische Maschinenbau-Gesellschaft Grafenstaden was in fact the same, as Société Alsacienne de Constructions Mécaniques? (the later name seems to mean the same in French). Article on Société Alsacienne de Constructions Mécaniques says, that in 1872 the company of Koechlin merged with the Graffenstaden to form SACM. Pibwl ←« 17:00, 13 June 2012 (UTC)