French.

"This howitzer was related to previous also Schneider designed Russian 6 dm polevaja gaubitsa sistemy Schneidera (152 H/10) heavy howitzer. The howitzer entered (first) to service of French Army in 1917 and soon proved excellent...

French.

"This howitzer was related to previous also Schneider designed Russian 6 dm polevaja gaubitsa sistemy Schneidera (152 H/10) heavy howitzer. The howitzer entered (first) to service of French Army in 1917 and soon proved excellent artillery weapon. Bit more than 2,000 were still in use of French Army in 1939 - 1940. The howitzer also was very successful abroad. It was known as "155 mm howitzer M1917" in United States, where the howitzer and its improved version "155 mm howitzer M1917A1" were manufactured under license. In Poland the howitzer was known as "155 mm haubica wz. 1917" and in Italy "Obice de 155/14 PB". Some where also delivered to Russia, where the Soviets later modified them in 152.4-mm calibre (version commonly known as "152-17S"). Other user countries included: Belgium, Brazil, Greece, Romania and Yugoslavia. Being so numerous and widely spread large number of these howitzers fell to German hands when they occupied these countries. The Germans called the most numerous version (previously owned by France) as "15,5 sFH 414" and Soviet version "15,2 cm sFH 449 (r)". The captured howitzers saw use with both German Field Artillery and coastal defence."

http://www.jaegerplatoon.net/ARTILLERY6.htm

Was that a US or British designed gun?