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.

Camilllus Cut Co Easy Open Knife
Early Camillus Cut Co NY 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

Old Vintage Antique Pal Blade Easy Open Jack Folding Pocket Knife
eBay
$79.99
Old Vintage Antique Pal Blade Easy Open Jack Folding Pocket Knife
KILBY TRADITION PINE KNOT KY WOOD EASY OPEN FLOP EARED PREMIUM JACK KNIFE
eBay
$95.00
KILBY TRADITION PINE KNOT KY WOOD EASY OPEN FLOP EARED PREMIUM JACK KNIFE
Remington 1924-1933 Easy Open Knife Green Pic Bone Scales Used
eBay
$295.00
Remington 1924-1933 Easy Open Knife Green Pic Bone Scales Used
KILBY TRADITION PINE KNOT KY BLCK DELRIN EASY OPEN FLOP EARED PREMIUM JACK KNIFE
eBay
$95.00
KILBY TRADITION PINE KNOT KY BLCK DELRIN EASY OPEN FLOP EARED PREMIUM JACK KNIFE
Knife Pocket Valley Forge Rosewood 2 Blade Easy Open Jack Antique Vintage
eBay
$110.00
Knife Pocket Valley Forge Rosewood 2 Blade Easy Open Jack Antique Vintage
VINTAGE E.C. SIMMONS KEEN KUTTER 2 BLADE EASY OPEN POCKET KNIFE USA RARE
eBay
$175.00
VINTAGE E.C. SIMMONS KEEN KUTTER 2 BLADE EASY OPEN POCKET KNIFE USA RARE
Cattaraugus Celuloid Small Easy Open Jack Scout Folding Pocket Knife! 24884
eBay
$139.99
Cattaraugus Celuloid Small Easy Open Jack Scout Folding Pocket Knife! 24884
Kent NY City Easy Open Boys Knife
eBay
$75.00
Kent NY City Easy Open Boys Knife
VINTAGE CAMILLUS CUTLERY CO. EASY OPENER POCKET KNIFE Beautiful BONE HANDLES
eBay
$90.00
VINTAGE CAMILLUS CUTLERY CO. EASY OPENER POCKET KNIFE Beautiful BONE HANDLES
1930's Camillus N.Y. U.S.A. 4-Line "Easy Open" Bone Pocket Knife Rare 2 Blade
eBay
$128.00
1930's Camillus N.Y. U.S.A. 4-Line "Easy Open" Bone Pocket Knife Rare 2 Blade
Remington UMC Easy Open knife (lot#20751)
eBay
$165.95
Remington UMC Easy Open knife (lot#20751)
1930-1940's Camillus N.Y. 4-Line "Easy Open" Bone Pocket Knife w /2 Blades-RARE
eBay
$75.00
1930-1940's Camillus N.Y. 4-Line "Easy Open" Bone Pocket Knife w /2 Blades-RARE