Corolla anichua didn't bring many results, but after looking at different Spanish Mauser clones, I found this one...
https://www.forgottenweapons.com/early-automatic-pistols/charola-anitua/
>The Charola-Anitua is an early Spanish semiauto pistol dating from 1898. The mechanism of the Charola is similar in principle to the Mauser C96, with a moving wedge being used to lock the bolt to the barrel/slide (which is machined as a single unit, like the Mauser). Upon recoiling backwards about 5mm, the wedge disengages, the barrel stops, and the bolt continues recoiling backwards to eject the empty case.
>While this principle is similar to the Mauser pistol, the Charola-Anitua is a much simpler design and much cruder in execution, with a simplified locking lug and slide assembly.(...)
Curiously obscure for a gag manga, haha....