So, for the last few years I've been associating with some of the Napoleonic history forums and have made known my special interest in the Girandoni. Not much has come from this until today when a researcher tossed up a handful of references. A number of which are very interesting. One in particular
http://www.dhm.de/datenbank/dhm.php?...fld_0=AK004240

shows a somewhat different looking Girandoni (at least different from the usual 11mm English made ones) and what was most striking was the caliber 1.4cm. So, I fired off a note to the museum and got a fast response. I've put the question to them about the importance of verifying the caliber and in the mean time they sent me the full catalog record. The gun is inscribed: GIRARDONI INUENIT ET FECIT (Girardoni invented it and made it)