Canvas Identification

[super dave]

I don't know if this is the place to ask but here goes. I picked up two tarps yesterday and I believe that one is for an M135 but not totally sure. The NSN number of 2510.21.104.3933 is marked on the inside of the cover but I do not have a parts manual to verify it??

The second cover has the markings of (Western tarpaulin & Textile LTD Toronto inside a diamond ) with number 22926. It measure 14' long without the ends 8' wide with 3' sides on it and has 11 buckles on the sides and 4 on the ends ??

Any help identifying either tarp would be great.

Dave