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Daydé & Pillé of Creil, France.
Iron and steel constructors, boiler makers.
Founded by Henri Daydé.
The company was first called Daydé , then briefly Lebrun, Pillé & Daydé (1880), then Daydé & Pillé (1882), then finally again Daydé (1903). The company merged in 1964 into the Compagnie Française d'Entreprises, now CFEM, and finally integrated into Eiffel constructions métalliques.
See Wikipedia entry, which includes a list of major structural projects.
1889 Made Lagosse & Bouché water tube boilers used at the Paris Exhibition.
Old works photos here.