Hi Norman,
Very nice example of a Punal (dagger) Type B.
As you rightly say, probobly made in Albacete in the second half of the 19th century.
These insert blade types are very interesting. What does it do?
Best
Gene
P.S. Carlos has got an impressive selection fo these:
http://www.vikingsword.com/vb/showthread.php?t=16211