Thanks for the links to the photos. Looks like a nice original Artillery waffenrock. The aiguillete is worn by officers only. With an enlisted waffenrock you could use the shooting landyard in the same place. The rank on this one is for a Oberfeldwebel and has a Specialist patch on the sleave for a "motor maintenance sergeant".
Have you picked up the book on Waffenrocks yet? If not you should, it's a great book.
