Pacifics 4500 series 4501- 4570 and 4571 - 4600
(two consecutive orders). 4501 was the very first Pacific built
in europe, delivered to the P.O. in july 1907 by the Graffenstaden plant
of Société Alsacienne de Construction Mécanique, often
designated by its acronym S.A.C.M., 1 year before the first "Bavarian
Pacific" built by Krauss- Maffei.
They supplied some items (parts of chassis, wheels,
...) used later by Chapelon to produce his 480s.