Please help me ID the real "Buddy Buckets"

[prostreetC-10]

Just bought a carb and intake off a guy and got a smoking good deal. Walked around the other side of his non-running truck and ran into a buddy bucket setup. Casually asked him about them. Keep in mind they "were" not for sale. He said they came out of a small back window 67. When I asked if he would part with them.....he basically said yes.

I have read other posts were guy thought they were buying the right ones then found out they were not even chevy seats. There is even some IH seats on ebay right now that look the same. They look structurally great. The driver's side will need foam and recovered (the ones I'm looking at).

How can I tell if these are the real chevy truck buddies? They did come out of one and they don't look altered but I want to be sure.

Thanks!