Recently won this on ebay. I liked the coins being in it. They are barber half dollars 1892-1915 so that gives a rough dating at late 18th early 19th century for this barong. Based on its blade shape I would be more inclined to say 19th. It is nicely watered steel although it could use a better polish and etch to bring it out.
http://www.ebay.com/itm/PHILIPPINE-M...vip=true&rt=nc