Recent theories of the "butterfly knife" point to the usage of this design on Spanish ships before it was ever adopted on the shores of the Philippine Islands. The design was based on the principle that in the bowels of Spanish ships, where the gunpowder for the cannons was stored, sparks and flames could be disasterous, and so any metal that could drop and cause a spark on the side of a cannon was a risk, but metal knives were needed to trim the silk fuses of the cannons. The design of the butterfly knife allowed the metal blade to be easily deployed, even with just one hand, but to be safely encased in wood when not in use. The fact that it was a occurance on Spanish ships give a direct method of exposure to the PIs, where it theoretically took hold, especially and possibly first in the area of Batangas.
What do you guys think?
What do you guys think?