IN PARIS THERE IS AN ( AFRICAN AND OCEANIC MUSEUM) IT HAS QUITE A FEW WEAPONS BUT I DON'T KNOW IF PHILIPPINE WEAPONS ARE INCLUDED BUT THEY OFTEN ARE INCLUDED IN OCEANIC ITEMS. THE MUSEUM IS A BIT OFF THE TOURIST TRAILS BUT IS A NICE ONE.
YOU MENTIONED AMSTERDAM. OUTSIDE OF AMESTERDAN ON THE WAY TO GERMANY IS THE KROLLER MUELLER MUSEUM IT HAS AN ART MUSEM AS WELL AS A SEPARATE ARMS MUSEUM NOT SURE IF ANY PHILIPPINE ITEMS ARE ON HAND BUT THE COLLECTIONS ARE FIRST RATE.
HAVE A GOOD TRIP AND GOOD LUCK ON GAINING ACCESS TO WHAT YOU SEEK.

NEAR STRATFORD UPON THE AVON, ENGLAND IS WARWIK AND WARWIK CASTLE IT IS SORT OF A MUSEUM WITH LOTS OF WEAPONS, NO PHILIPPINE ITEMS BUT A COOL PLACE WITH A VERY CREEPY DUNGEON AS WELL AS TOWER WITH ITS OWN GHOST. THERE SHOULD BE SOME PICTURES OF THE CASTLE IN OLD FORUM POSTS.