Here's a photo of cadets of the Paraguayan Military Academy c. 1910 with tone of he Krupp 75 mm L.14 mod. 1907 guns. These guns served throughout the revolutions of 1911 and 1922 and the Chaco War..they were sold to the Spanish "Republicans" in 1937, along wth other Chaco War surplues..
I believe they are one an the same, here's a page from Franza Kosar's"A Pocket History of rtillery: Light Field Guns" (IAn Allan, london, 1974) I sent him a clearer version of this photo (which I have since lost) and that was his verdict...
Paraguay purchased 2 batteries (8 guns) of these Krupp 75mm L.14 mod. 1907. They were used during the Revolutions (read Uprising) of 1911 and the Civil War of 1922, when one of them was lost under unknown circumstances. The surviving 7 guns served with the 2nd. Artillery Group during the Chaco War, and in 1937 these guns,some army surplus equipment and other war trophies were sold to the "Republican" faction during the Spanish Civil War.