The 'Rosen-Zeitung' contains an entry concerning 'Leon Lecomte':
Leon Lecomte, Breeder Louis Walter, Saverne (Zabern), introduced 1914. Description: "Free flowering, height about one meter, centifolia-shaped flowers and color, fragrant, best flowering on old wood." [R-Z, 1914/101]
There was a aviator from Mulhouse called Léon Lecomte who crashed and died on September 7, 1911. It could well be that Walter's rose commemorated this Lecomte. Another Léon Lecomte was apparently a French economic expert in the 1840s who made investigations regarding a canal in Central America. However, as there seem to be no early references to a damask called 'Léon Lecomte', your source is most probably the correct identification.
