KM 7X50 binoculars, opinions please!

[alone01]

Hello Gents,
I wonder if these KM 7X50 binoculars are original? Serial number is 1891688. According to Seeger's grey book, it should be a DF7x50, but I don't know if the marking on the right should be "N" . I'd like to hear your opinions. http://www.ebay.com/itm/130940043504...504%26_rdc%3D1
Thanks in advance!
Regards,MZC

[benutzer]

it is an D.F 7x50 and it's original

here you see the 1891280

[alone01]

Thank you very much!
Best regards
MZC