I should point out that if you do own a 206 and need a new key then this product is more likely to be the one:Entry Key Remote Fob Shell Case 2 Button for Peugeot 106 107
However, I didn't find that at the time. The plastic bit looked identical to my Peugeot 206SW key and I only needed the plastic button cover with the two padlock logo's on it. Mine had developed cracks and the lumps on the back of the button covers that actually engage with the switches had broken off,and I could no longer lock my car remotely without using two thumbs to squeeze the key. The reason the rest of the key isn't compatible with 206 is because the metal key blank is the wrong shape.
As it states in the description, this is an after market replacement case, so there isn't a Peugeot logo on the back, (which is why none of the photo's show the back.) The side shown in the photo's looks identical, even down to the indented serial number at the top. If you want to be pedantic, the padlock logo's are slightly different, but no-one will notice, or care. The button cover does fit perfectly to the bottom half of the plastics with my actual key in it, although it doesn't snap in quite so tightly, the two halves can be separated with a fingernail, rather than a screwdriver, but since it's being screwed together that doesn't matter. Internally the electronics slid over the locating lugs and lined up with the buttons perfectly, so I can lock my car remotely again. I don't have an immobiliser or alarm, so there is nothing else to swap over.
I bought mine from Gifts for you, who at the time had the cheapest price, albeit with a huge postage charge. Another company are at the top now, with a more honest price and free postage, so take your pick. The one from Gifts for you did arrive next day though, so I will recommend them.