Raimey,

The majority of well known retailers in Paris had their stuff made in Belgium starting at the end of the 19th Century, such that after WWII, there was basically nothing left of the trade in Paris.
St Etienne was also hit very hard and most companies fell on tough times. It is not crazy to admit that V-C subcontracted a gun in Liege in 1966 (that's when this one was made).
V-C was registered to the Liege proof house from at least 1924-1929 and an operation in town.Could have lasted longer.
They did mark it "a Liege" to warn the customer that the gun had not been made in St-Etienne.
None of this is earth shattering.
Best regards,
WC-