Here is a photo of the date stamp. 

Nice scores, SonofNamVet! As an aside, the guy in the first photo that I enlarged here:     … is carrying his M26 hand grenade on his harness. This tells us, even without looking at the background that he’s operating in a mountainous region, a semi-cleared area, or a rice paddy. On the other hand, if he was patrolling in jungle there are too many things, such as bamboo and “wait-a-minute” vines, that could pull that grenade pin out. So, these grenades in the jungle were usually carried in a pouch or an old Claymore Mine bag or something similar.

That is very helpful! Thank you for the history and what to look out for. The University of Cincinnati sounds right with the "UC" on the front. Very cool stuff.  Thank you, Hayden

Were there butane lighters in Vietnam? I have one that my grandfather gave me. He had it in Germany in 62 with the 5th armored division 

With the Ohio buttons, it is very likely University of Cincinnati. Here is a photo from an auction site that the seller claims is of a cadet from University of California, Berkley. This is just to give you an idea of what "UC" can represent.   

This time I did research on the Airborne patch 

I got a couple of Airborne lighters. They are in rough shape. However,  I was able to get both lighters for $80. I felt this was more reasonably priced than some of the junk that is being sold as authentic. Thank you yokota57 for the helpful information. 

Thank you, so much for offering. I’ve been in touch with several sources who said that the files from the WWII era were destroyed.   Is there a way to send you this information directly via email? If not, I’ll send it here. I’m a little cautious about putting information like this on a  website. 

I have a repro set of these waiting to go on, original would decay pretty fast I think.    

A couple of things to add. When I've used Tung Oil, I first strip the wood of any finish or previous surface applications. When disposing of rags with the oil on them, I put them in a zip lock bag, add some water, seal the bag, and dispose of it.  You need to be careful.