Unusual lock for ID

[fernando]

This is quite new for me .
The lock properly said is done by a patilha device, but all the rest is atypical to the patilha (Miquelete) concept.
The 'master' spring is inside, the usual classic percussion spring.
The locking mechanism inside, where the spring catches, is composed by an 'integral' setup, quite sophisticated.
The exterior half cocked position, instead of being the patilha wedge that rests on the 'button', is its inside curve that rests on the said 'button'.
I ignore whether my pocket lexicon is clear, but i hope that the pictures speak for themselves.
Anyone familiar with this lock version? Dom Manuel Iravedra? Stuart? Any other gentle Forumite?

Thanks in advance

Fernando

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