Easy open knives feature a notch near the wide end of a common jack knife pattern, typically a swell end knife. The spear point blade can either be opened with the nail pull or by grabbing the exposed portion of the blade in the notch. Sometimes a nail notch is not even present on the blade of an easy open knife.

Easy open knives were especially popular from the early 1900s to the 1950s and were made by companies such as Robeson, Remington, Case XX, Camillus, Schrade Cut Co, and more.
Check out these vintage easy open knives that are currently available on eBay. I appreciate any traffic from these links as I earn a commission when an item is purchased, at no extra cost to you. THANK YOU!!! – Jesse, oldpocketknives.com
eBay
$145.00
1900-1920's EC SIMMONS ST LOUIS Vintage RARE Big 2 BLADE Easy Open KNIFE
eBay
$198.00
Robeson Shuredge Easy Open Jack Knife 1922-1939
eBay
$137.87
Vintage PAL CUTLERY Jack Pocket Knife 1940 s Jigged Bone Easy Open Good Snaps
eBay
$165.00
Pal Blade Co. Easy Open Jack Knife (1939-1953) BOTH BLADE HAS GREAT SNAP
eBay
$73.00
KILBY TRADITION PINE KNOT KY GREEN BONE EASY OPEN FLOP EARED JACK KNIFE (29387)
eBay
$125.00
vintage 4-Line Camillus Bone handle 2 blade easy open knife
eBay
$119.00
Vintage Utica Cuterly Co 2 Blade Folding Pocket Knife Easy Open USA RogersBone
eBay
$149.99
Vintage CX Lockwood Bros Easy Open Jack Pocket Knife Cold Finger
eBay
$189.00
Antique Russell Barlow Pocket Knife No Nail Nick Easy Open Rare Bone Handle
eBay
$77.00
Vintage Case Pocket Knife 2 Blade Easy Open Well aged Pocket Knife
