Here tis. A couple of quick and dirty shots of mallard neck/head and some indiv. feathers.
You can see they are a lot different from what you have Hans. I would suggest you are right in that yours are Peacock. Would be reasonably rare to find Peacock neck feathers as they are not likely to be a "regular" hackle. They are wild in some parts of NZ but alas not my part, o/w I'd be out there now looking for one as it's game bird season. What you have there is a nice looking feather!
Apologies and entirely off topic (sort of..) but here is a neck/head skin of a common ring tailed pheasant. As you can see there is a marvellous almost emerald coloured hue to the feathers up on the neck. And you can see the olive hued feathers on the side, plus the ring neck feathers.
I would certainly suggest that they have been identified by someone before me as potential fish taking feathers. The feathers just scream "USE ME" when you look at them. To be brutally honest I have tied a number of flies with the feathers shown, but not as yet used them often - a couple of fish seemed to like 'em. As far as wee wets are concerned, I was primarily in a bit of a Spur Winged Plover phase this season!
BTW: I have just learned a wee lesson: After taking pictures of skins - don't leave them where a Cocker Spaniel can find them. The Little Trickster just chewed the pheasant neck to bits!!!
An absent moment. My fault entirely......
