I like going to Easter flea markets in Rome, because there's almost no one buying and so you can find more and cheaper pens!
Today I have been lucky enough to find a Tibaldi Infrangibile (it's the bottom one in the first photo), a very nice, quite rare, Italian high tier pen, from the late '30s.
My pen is an oversize (as identified by the #26 imprinted at the bottom of the blind cap), Serie II, button fill model, in a very nice mottled green-brown celluloid.
The cap lib is broken, so I am in the hunt of parts made of similarly colored celluloid, to fuse for reconstruction surgery.