The de Bange 155 mm long cannon mle. 1877 was the French artillery piece that debuted the 155 mm caliber, which is still in widespread use across the world today. Although obsolete by the beginning of
155 K 77 cannon at Salpa Line Museum, Miehikkälä, Finland
A 155 L pulled into position at the Pontarlier artillery school, 1905-1910
The 155 mm Creusot Long Tom was a French siege gun manufactured by Schneider et Cie in Le Creusot, France and used by the Boers in the Second Boer War as field guns.
De Bange 155 mm cannon
…Norwalk Green, Norwalk, Connecticut, United States - gift of the French Government in 1921 155 mm Creusot Long Tom Canon de 155 L Modèle 1877 at landships.info…
Long Tom being loaded during the siege of Mafeking
Long Tom drawing in manual, showing pivot plate, hydraulic recoil cylinder, chock and two kinds of trunnion cups.
Long Tom replica at Fort Klapperkop
Long Tom "Grietjie" (or "Creaky") was i.a. placed on a constructed platform south of Jackal Tree Hill, to the south of Mafeking. It was however moved 7 times during the siege.