Help ID Shoulder Insignia

[ThuringenNSDAP]

I have a couple of photos of my grandfather's military service but don't know how to identify his Regt / Unit etc. based on the shoulder insignia.

Can anyone assist?

R.Fuerste_Photo_Young001.jpg
R,E,F&C.Fuerste_SiblingPhoto001.jpg
R.Fuerste_Photo_GPB001.jpg

[Schulterklappen]

Photos

I have a couple of photos of my grandfather's military service but don't know how to identify his Regt / Unit etc. based on the shoulder insignia.

Can anyone assist?

R.Fuerste_Photo_Young001.jpg
R,E,F&C.Fuerste_SiblingPhoto001.jpg
R.Fuerste_Photo_GPB001.jpg

I will be happy to try to help; but, the photos did not post.