Correct, Patrick.
"monomatricola" means that all rifles parts are bearing same serial number.
The price for these kinds of rifle in Italyicon is crazy, people are trying to sell at 1.200 Euro !

Please have a look here
Armiusate.it :: Novara : Armi lunghe : Mauser K98 1937 - CONTRATTO PORTOGHESE 8x57 JRS
and here
Armiusate.it :: Novara : Armi lunghe : Mauser K 98/ Portoghese 1937 8x57 JRS
and here
Armiusate.it :: Torino : Fucili a canna rigata : Mauser K 98 8x57 JRS



Thank you (Vielen Dank) again for your answers.