Hi Denny,
Thank you for the reply, I'm continuing to research them and will post what I find.

I have a Luftschutz helmet marked to Georg Rieder, Munchen (decal) and am researching whether it may be a helmet procured by GR for their own internal werkluftschutz use, or was simply a helmet distributed by GR acting as a vendor. GR is not listed on the KN listing of known approved distributors of LS helmets. An interesting part of this is that the helmet itself was sourced from the firm of Paul Diener (Dresden) as denoted by the stamped KN (RL 2-38/28). Paul Diener was an approved distributor of LS helmets. Now it's trying to tie the two connections together to ID the GR role in the helmet's history.

Thanks again,
Don