Miguel, Thank you for your kind words. This style of dagger can be found all over the world with Spain, france and Mexico being just a few of many countries where it was used. This dagger shows a great amount of Spanish influence in its design no double from the hundreds of years of Spanish occupation. The British commando knife/dagger is just one of many daggers with this styling.
Detlef, Thank you for your kind words as well. I thought that you would like this piece as we so frequently find ourselves bidding on the same items on ebay.
I do not believe that Miguel was saying that he thought this dagger was from WWII, but was just comparing the British dagger to it in styling. I believe this dagger to be from the late 19th century. If I am correct in its age it would have been from the right era so as you have suggested it could very possibly be a Katipunan piece as well.
Best,
Robert