Ok the full legend should read "PHS. D.G. HISP. Z. REX. DV. BR", or a variant of this, if I've got my Kings right.  This translates to "Philip by the Grace of God, King of Spain and Duke of Brabant."  The reverse should read "DOMINVS. MIHI. ADIVTOR" which translates to "The Lord is my helper."  This is a Spanish coin, but we would really need pictures to identify further with a suitable world coin catalogue.