With the thing in the center

Greetings, why do some A8B masks have a circle in the middle while some a have a line going into a circle?

Picked up a few bargains today, ready for our entry back into Jeep ownership. well my lad, I'm too wise to go back down that road 40 yrs after my first Jeep. This way I will get to play mechanic and share in some of the fun of Jeep ownership . That's all to come, in the meantime I'm gathering bits as and when I find them just in case.

boxerdogi a last question. What brand name is the receiver? Sierra or Roanwell? I dont know where id find the mic clip at to replace. I dont know how old the Roanwell black clip replacement is on my helmet. Cant find a date source but i see them on vietnam aph5 helmets for the mic. 

Here's two more, one is lightweight. Both have a "combat" jump indicator on the parachutist's wings. I think the Field Artillery LTC's was worn by the 2nd battalion, 319th Field Artillery commander.  

I've seen one of these before (but he would not sell it to me)   Operations Department - Do I Look Like I Give a F...

Nice helmet.Thank you boxerdogi. Would you know the correct boom mic for this also? Much appreciated.

Yes, that's my take on it despite the typo in my first post.

Reviving a very old topic here but I can't seem to find the answer I'm looking for- after the adoption of the Alice bandage pouch, was the sodium bicarbonate packet ever actually issued/carried along with the two first aid dressings? From the thread I can see it was designed to accommodate but it looks like as time went on, that requirement fell to the wayside

. Hi Graham,   thanks for keeping some of the catalogs I did and your kind comment about the contents and photos,  one of the rear cover photos you have shown is a photograph of John Rowe who Johan and I mentioned a few posts ago at Easter, it was one of the photo reconstructions we did around the late 80's early 90's .  All the kit worn by everyone were original items and the photos often taken by Simone Pugh who is seen in the top left rear cover kneeling holding a camera.       Norman D. Landing, Forum Normandy Correspondent, May 04 2O25.   ….