Hi VN, that's a beautiful piece! I love that it includes all the booklets. Just a quick tip for using the forum: there is a 'Quote' button right below everyone's posts. If you click that, a small button will pop up in the bottom right corner that says 'Quote 1 post'. If you click that popup, it will automatically start a new reply for you. This links your response directly to their message so people can easily click back and see what you are replying to.   Note: You can also delete parts of the quoted text inside your draft to slim it down. This is great for removing big walls of images so the thread stays clean! Hope this explanation helps! Welcome to the forum. :)

I recently got this vest and the original handbook, it's in great condition, everything it's functional without problem

(reply to 6 corbra actual)I collec wartime stuffs in vietnam and surplus, I recenly got this ARVN m69 body armor, check this beuty out

Can’t wait to see what you’ll find next.

Ive been working on my 620 and both 659s. I have battery packs to replace the internal battery thats non existent.  Hoping to power up soon off the MB and test one out.

More reading show the 51/p is F-111 specific 

Flight helmet is a HGU-51/p… mask was (?) modified for use with it… it’s close    no doubt you have a one off..👍👍

https://www.salimbeti.com/aviation/helmets7.htm

I found this on Salimbeti’s web site

Drive up north a bit to Orange County and visit Vintage Productions