Need help with Vintage Leather Football Helmet

Hi, guys I am selling some stuff for an Uncle of mine as a favor. He has this really old football helmet and I can't find out much about it. There are some picts below. The inside says House of Harter, a number which I assume is model 1195 and a size, 6 3/4. I believe it is a HS helmet even though it has a Michigan look to it. It has some wear to it but it is incredibly heavy duty. He bought it in the 70s.
If someone could point me in the right direction I would appreciate it. I am going to try and list it on ebay but need more info.
Thanks


If someone could point me in the right direction I would appreciate it. I am going to try and list it on ebay but need more info.
Thanks



Currently completing the following registry sets: Cardinal HOF's, 1961 Pittsburgh Pirates Team, 1972 Pittsburgh Pirates Team, 1980 Pittsburgh Pirates Team, Bill Mazeroski Master & Basic Sets, Roberto Clemente Master & Basic Sets, Willie Stargell Master & Basic Sets and Terry Bradshaw Basic Set
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Comments
http://sportsfansnews.com/author/andy-fischer/
I have no idea if it's a Michigan helmet or not, but here's a reference for Michigan helmets.
The helmet pattern looks identical to this photo
helmet
"My husband recently passed away and now I'm left selling all his old sportscards and memorabilia. I found this yucky old helmet in his display case. There's some writing on the inside of the helmet with the words "insert famous NFL HOFer name here". Since I know nothing about football, I have no clue what it means but I assume it's an old football helmet company. According to ebay rules, I am not allowed to say this helmet is authentic so please bid accordingly. I'm going to start the auction with a very low opening bid of $25,000."
Seeking primarily PSA graded pre-war "type" cards
My PSA Registry Sets
34 Goudey, 75 Topps Mini, Hall of Fame Complete Set, 1985 Topps Tiffany, Hall of Fame Players Complete Set