Obusier de 15 cm Valée allowing the whole artillery train to move as fast as the infantry or cavalry. Valée also improved the guns themselves slightly, by making them lighter, and with a longer range. The complete Valée system consisted in siege guns of 24 and 16 inches, and field guns of 12 and 8 inches. It also included field howitzers of 24 and 6 inches, and a siege howitzer of 8 inches. Mountain artillery pieces were of 12 inches caliber. Mortars were of 12, 10 and 8 inches, with a 15 inches stone mortar. French artillery would be reorganized along the Valee system in
15 cm/45 41st Year Type Japanese designation system for artillery changed from inches "6 in/45 41st Year Type" to centimeters "15 cm/45 41st Year Type". Whether the guns originated in Britain or were built in Japan they still shared the same 41st Year designation. The 15 cm/45 41st Year was constructed of an A tube and wire wound with a protective outer jacket. Ships built in British shipyards for Japan were armed with Pattern GG guns and later Japan produced their own versions under license at the Kure Naval Arsenal. Four different models were produced at Kure which differed in the style of rifling used.