In my post last week about the 75mm M1897 in Russia, the issue arose of the late 4-piece shield for the gun, which is described in American technical manuals as the "American" shield, while the earlier articulated 7-piece shield is called the "French" shield.
The noted French artillery specialist Gen. Guy Francois has been running a short piece on the various 75mm M1897 shields over on the "Forum Pages 14-18" entitled "Les différents boucliers du canon de 75 modèle 1897". This covers the original 2-piece shield, the 1902 Moroccan shield, and the 1909 articulated 7-piece shield.
His latest post indicates that the simplified 4-piece shield was not a US design, but rather a late 1916 French design.
On a related note, I was down at NARA II today and pulled the 75mm M.1897 manufacturing plans from Record Group 156 to see if they could illuminate this subject. Unfortunately, the plans cover only the barrel and breech with nothing on the shields or carriage.
Great information about the shield types in service with the French 75mm mle/97. This is another layer of dogma about the "French 75" that can be put to rest from the US Ordnance and Field Artillery branches.