All About Pocket Knives

I was told this knife is WWII era, can anyone confirm that?
Has a leather handle that I wrapped in 550 cord.

Originally named the "Navy Jet Pilots Knife", they didn't see the light of day until 1957. The following was copied from a post on a forum called HighRoad. https://www.thehighroad.org/index.php?t ... fe.356960/

"The knife was designed by the Navy Weapons Bureau & Marbles in 1957. The original (Type 1) had a 6" blade.

Later, Cammillus ended up with the contract, and new specs (Type 2 = 1962) shortened the blade to 5" for less interference with flight gear in the cockpit.

Camillus, Utica, and Ontario, and Milpar have made them through the years.
Milpar made the Type 3 with a cast aluminum handle.

All versions after the first one have 5" blades.

The more recent one I have in my collection by Ontario has a full metal (black) liner on the back of the natural color sheath that wraps around the bottom and comes up to the stone pocket on the front to prevent accidental cut-through.
The Vietnam era ones didn't.

Official name now is:
Knife, Hunting, Sheathed, Survival, Pilot.
#7340-00-098-4327
MIL -K-8662E
GS-07F-40050
Ontario Knife Company
9/90"

Here's a post about the JPK knives on the U.S. Militaria Forum that may interest you. http://www.usmilitariaforum.com/forums/ ... val-knife/

You can take Jerry's comments to the bank, and that hotlink is priceless information.
Meanwhile, those knives were the final evolution of some earlier contracts of the Marbles/Imperial/Schrade jet pilot knives

Schrade Walden pilot fixed blade:
"It is a "Pilot Survival Knife" (a comment on one and which I have an example of) and 100% U.S. military issue from 1953-1957. Designated "MIL-k-8662(AER)," it was replaced by the Jet Pilot Knife. It was also made by Camillus and Imperial. Schrade made two versions"
“First adopted on 16 October 1953 as the MIL-K-8662 (AER) Pilot Survival Knife this Schrade design was the issue flight knife until 1957.”
“First adopted on 16 October 1953 as the MIL-K-8662 (AER) Pilot Survival Knife this Schrade design was the issue flight knife until 1957 when the military adopted the now familiar Jet Pilots Knife as designed by Marbles but generally supplied in bulk back then by Camillus...
... Schrade won a bid in 1956 on 23,787 of this pattern knives for the Navy. The cost with sheath was ... $1.196 each, oh for those days again.”
1.) 16 Oct 1953, MIL-K-8662 (AER) adopted (MIL-K-8662 adopted as per the Imperial sample)
2.) 21 Jul 1954 , MIL-K-8662 (1) (AER) Amendment 1 (Sharpen clip point and additional rivet added to scabbard)
3.) 04 Nov 1957, MIL-K-8662A (AER) adopted (Completely new design as the Marbles Jet Pilot Survival Knife (screw pommel))