Hi Bruce
I wonder if this was meant for the exhaust manifold side of the cover?
The asbestos covering looks similar to the covering used on the Pat 12 dog houses, the insulation on my Pat 13s looks to be a spray on type rubberize insulation with non of the little staple holes found on the Pat 12 covers.
Here is a link to some photos
http://canadianmilitarypattern.com/P...20Drawings.htm the Tan cover is from my 1942 Pat 13 C60S while the OD is from my 1945 HUP. I did these drawings a couple of years ago when somebody was wondering about fabricating a dog house that was missing.
Cheers Phil