There are older Wilkinson Sword blades produced in England, generally stainless and very-well regarded (although possibly over-hyped due to rarity). Ones I've laid my hands on are in white tucks (although they've yellowed with age), with 'MADE IN ENGLAND' moulded-in.
There are modern Wilkinson Sword blades produced in Germany with a multi-layer coating. I prefer these ones - although they're not quite as long lasting, they're a bit smoother (YMMV). They currently come in a black tuck which is a bit more rounded than in your picture, but I've seen them in white too.
If I was a gambling man I'd say yours were German (based on the printing on the wrapper more than anything), but someone with greater knowledge will probably be along in a minute.