Vintage David Clark 7HB Military Headset 1973 Very Rare Helmet Not Included For Sale

Vintage David Clark 7HB Military Headset 1973 Very Rare. (Helmet Not Included!) just pictured to show how the headset fit under the helmet. This headset it very rare. I had to contact the David Clark company just to find out what model they were. David Clark Co. had very little information other than the model and they were produced in 1973 and only sold to the military and military contracts. David Clark co. Sent me new ear seals for them that will also come with the headset. Unknown if they new ear seals will fit correctly but they look like they might.