Looking for similar Luzon hilt styles

[xasterix]

Good day everyone! Just wondering if you guys have a piece similar to mine, especially with regard to the hilt design. A friend estimated this piece to be 1970-1990s, Luzon made. I've seen similar hilts from modern blades (1970 onwards) that originated from a town called Majayjay, in the province of Laguna. Blade profile is common in many other Luzon provinces; it is called 'sungot hipon', which roughly translates to 'shrimp's antennae'.

I'm curious about the following things:

1. What older pieces inspired this hilt and/or scabbard design?
2. When did this hilt style begin?
3. Can anyone ascertain why there's an engraving of a naked lady on the blade? Do any older pieces have such an... inspiration?
4. Chisel grind is not common for Luzon blades. Why do you think the owner/smith customized the blade to be such? Do you know of any advantage of chisel vs convex grind?

Measurements are 6-inch albino carabao horn hilt and 8.5-inch blade. Steel studs and various engravings can be found throughout the hilt. Hope you guys can share similar pieces!