Benten,
,,,that Hau-Ruck ring is a beauty! Aluminum was a premium material thru out the war,,,Maybe a zinc or a pot metal if really light. .. details real nice and deep..



This might be already posted here ,, Member Gerd author of this great work informs me that a new updated edition is in the works and he'll let us know when done....

He is the current magnificent works on the West Wall ring , enjoy:

http://gerdhagedorn.de/resources/MS+GH+Der+Westwallring+$28Web+2$29.pdf

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[don't know why links don't work here]

Wow! as of 1-10-20 we have over One Million views here of this topic.. smile