I have been following this topic for a few days, I thought I would throw in my two cents. I know all about over speculating. Don't beat yourself up like I have in the past. It just shows how much you care about the history of the helmet. You are probably the first person to show any genuine interest in it in 50 years. All of the team work here shows that there is a tight knit network of people who care about it as well. It's amazing that this individual has been brought "back to life" in a sense. As I am sure you all know, the Native American experience in American wars is often as heroic as it is heartbreaking. I have no doubt that the helmet was cast aside in some dark corner for 50 years. Just an observation on the helmet itself, depending on the location in NM, a lot of the wear and tear could be due to dry conditions and/or insects. I have no doubt that the graffiti and name is genuine on the Mitchell cover and band.  I believe you have a real piece of history. For what it's worth I also believe that this helmet is in good hands, I can tell that you genuinely care.

Forum search function is your friend...   https://www.usmilitariaforum.com/forums/index.php?/topic/373775-vietnam-dpsc-dir-of-mfg-label-data/

I received a fire badge for Letterkenny Ordnance Depot badge and a FD patch From Frankfort, Germany.  The Letterkenny OD was active from about 1941 until 1962 when it was redesignated as a Army Depot.

Any officer that isn’t “Staff Corps”, ( Supply, Medical, Legal, Civil Engineer). 

Thank you Leigh!!! I can not express enough how helpful and rejuvenating finding a picture is! I knew all that stuff about his mother and father, but finding a high school picture is amazing! That was right before he was enlisted/drafted as well.  Thank you for taking the time to do that. I really appreciate it.

I can’t find a date on this coat.  Any guesses?  Thanks

At least those guys were alive, my guy and all his family have all passed. Research is my only friend here, and I’m pretty bad at it.

Based on the very quick search I did, John Louis Harjo was born 14 October 1949 in Bristow Cree, Oklahoma. His father's name was Taylor Harjo and his mother's name was Bessie Brown.   Taylor was born June 26, 1918 and he passed away January 13, 1964. Taylor Harjo served in the US Army during WW2 with the 264th Coast Artillery, Battery B. He enlisted August 22, 1941 and was honorably discharged 31 March 1944. He is buried at the Thomas Tiger Cemetery in Bristow, Oklahoma. Based on Taylors Obituary he was survived by two son's John and Wayne, a daughter Delores and Taylor's mother Winey Harjo, all who lived in Bristow. Taylor had 5 brothers, Wilson, Paul, Kenneth all of Bristow, Wesley from Sand Springs and Barney from Oakhurst, and two sisters, Mrs. Vera Mason and Mrs. Patsy Lambert both of Oklahoma City.    So that is John Louis's Fathers side of the family and some information about him. I have no9t dug into Bessie Brown's side of the family... LOTS Of information and documents on Taylor Harjo on Ancestry...   You should also keep an open mind when searching for information regarding John Louis Harjo, there may be some official documents that list the names differently or they may even be misspelled. For example in some of the records I searched:   In February 1964 his name was listed as John Louis Harjo and on 08 May 1999 his name was listed as John L. Harjo.. What does mean in the scope of things... Different Records will have middle names, others will not.. Also you need to keep an open mind and possibly search for misspellings in the name and different spellings of the first name such as Johnny instead of John. A lot of this data is input by a person into these websites and they make spelling mistakes just like everyone does... So moral of the story, search different name spellings as an option, you may get some more hits or you may not...   Here is some information about John "Johnny" Louis Harjo: Born 14 October 1948, His daughter Denise Lynn Harjo was born February 6, 1960 and she passed  August 10, 2016. In 1966 records indicate John lived in Tulsa, Oklahoma, He passed on 19 April 1999 and is buried at Fort Gibson, Muskogee County, Oklahoma.    Here is a photo of John Louis Harjo, his estimated age was 16 years old and was a student at Central High School in Tulsa, Oklahoma.   There is much more information but I have to go to a meeting.   Hope this is helpful   Leigh               

Oh man. Matt was a great forum member and just a great guy. He was a tremendous source of good information and was always willing to help out when he could. I miss having him around here terribly. And I’m sure I’m far from the only one.  mikie