I've changed the translation a bit in the light of day...here is the correct sentence which changes things a bit.
(All the guns of Zavattero freres were equipped with either Belgian barrels using the Belgian mark or Zavattero Freres barrels marked "ZF".)
(In no case did guns made in Czechoslovakia have the same marks, but rather "CZ" in another script.I.e. Zavettero did not make guns in Czechoslovakia; the CZ on the Zavattero's meant something else, probably one of Zavattero's models (and note the two guns were likely made 40 years apart..
And here are subsequent comments: Perhaps Neitir was mistaken? Because Builders gun has both the ZF and the LFi mark on the barrels. The Zavattero forwarded by Gunwolf has the CZ mark (CYNEA?), is also marked St. Etienne and LFi and there is a Z F with some other writing.
Here is the Zavattero Freres mark on Builders barrels along with the St Etienne proof mark.
Here is the LFi mark on Builders gun.
Could this mark on Builders gun might be the postal code for St. Etienne.BP 72 ? (Seriously doubt this...anyone with an Ides? Initials of the owner maybe?
Here is the LFi mark on the other Zavattero in the line forwarded by Gunwolf. Its also has the St. Etienne stamp and proof mark
Yet it also has the CZ mark...from the ad below apparently a Shotgun model? FZ - Focor Zavattero; CZ = Cynea Zavettero?.
And here is the Z F on the gun posted by Gunwolf possibly surmounted by "Choke Rectifie" (but not on the barrel).
Here is the mark on the other Zavattero, link posted by Skeettz on the first page:
