I think this is period but can someone confirm for me please? Thanks 

Mark

I like it.

Ditto, looks good 

Thanks guys 

Looks good to me as  well.  I have an identical SA Sports armband with a period bring-back letter.  

 

 

"German WWII Cloth SA Sports Armband-Bright red cloth field with machine woven gold representation of the SA Sports Badge as its central motif. This is applied to a separately attached white disc which does have a bit of age discoloration and some spotting. The red cloth also shows some discoloration which is isolated to the front left side. These were worn by sports umpires, timekeepers and track officials, as well as other NSDAP formations competing for the SA Sports Badge. The ends are sewn together. This is a fine example, complete with a paper RZM tag! The tag does show some damage but it mostly in place."

 

From:

 

https://www.therupturedduck.com/products/german-wwii-cloth-sa-sports-armband