identification of key on 11 keyed flute

Irish Flute
1

Need some help identifying a key on the eleven keyed flute in the photos. I’ve been having a lot of fun playing this flute. It plays well at 440 and is of German extraction, I’m quite certain, from late 19th century or early 20th. At any rate, I would like some help identifying what note the key closest to the barrel plays. Hope the photos are clear enough for you to help. The flute is stamped by a maker/seller in Norway (but it is most certainly German). Thanks for any assistance you might be able to provide.


2

It’s a key used to do a e/d trill when playing the high “d”
http://www.oldflutes.com/misc/stand.htm

3

Thanks Steam Packet, that really does help. I was racking my brain to figure it out–now it’s solved.