[xasterix]

Hi everyone. Regarding the style of scabbard with that particular sheet binding, there's a provenanced tenegre picked up by Austrian explorers on an 1857-59 expedition that has a similar motif. Here's the description from the database-website "Mapping Philippine Culture," the sample itself is located in the Vienna Museum of Ethnology:

This sanduko bolo was obtained in Luzon but is typical for the island Panay. It features an elaborately carved and silver coated pommel, representing a demonic head - probably a naga or the mythical creature bakunawa. The blade has its center of gravity towards the tip, thus enabling to gain momentum for hacking and chopping cuts. (Oliver Moiseanu 2009: 63)

Here's the provenance:

The Austrian navy carried out its first major scientific mission with the frigate “Novara,” circumnavigating the globe within two years and three months (between April 30, 1857, and August 30, 1859). The crew returned with collections of botanical, geological, zoological, and cultural materials. This sanduko bolo was obtained in Luzon but is typical for the island Panay. It is among the few ethnological objects the “Novara” team collected in the Philippine Archipelago.