The Deutscher Reichskriegerbund KyffHäuser (Kyffhäuserbund) was the name of the veterans umbrella organisation that existed until 1938 (then it renamed into the NSRKB (National Socialistischer Reichskriegerbund)).
The armband shows the typical Kyffhauserbund image that was in use untill 1938, with the Kyffhäuser tower (Mahnmal denkmahl) design above a red field with swastika.
This dates thus the armband to at least BEFORE the institution of the new NSRKB organisation (that was formed on 29-043-1938). A nice early armband for sure.
The armband is made of dark blue wool and is in excellent condition. Unused and not sewn together. On the reverse is only a safety needle.