The Case 11 pattern, more commonly known as the Cheetah, has been around in some form or another since the pre – 1920 W.R. Case & Sons, Bradford, PA days and are highly sought after by collectors.  These knives measure 4 3/8″ closed, feature a swing guard and a lock for the single clip point blade.

Case XX USA 6111 1/2 Cheetah
Case XX USA 6111 1/2 made in 1970 (10 Dot)

The early 11 patterns did not have a swing guard, featured green bone handles, had long pulls on the blade and were referred to as an “English jack.”  The Cheetah name was first used around 1970 when Case added a running cheetah etch to the blade on the 5111 1/2 stag version.

Different handle materials and variation: top to bottom – 1977 (stag), 1974 (dark bone), 1970 (reddish bone), 1965-69 (red bone)

The characteristic swing guard was added to the Case Cheetah knife during the Tested XX era (1920 – 40) and remains on the knives to this day.  Handle materials on knives proir to the 1980s feature genuine sambar stag (5111 1/2) and variations of bone (6111 1/2).  There is also a rare variation where an extra “1” was mistakenly added to the pattern number (61111 1/2).  These are sometimes found on the knives made from 1965-69 and an unknown amount left the factory.  They are highly sought after by collectors.

Cheetah pattern number
Rare variation on the right – note the extra “1”found on the pattern number.

Check out my vintage Case XX knives page.

Check out the following Case Cheetah knives 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.

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Vintage Case XX USA 6111 1/2 L Pretty Dark Red Bone Cheetah Knife 10-dot '70 Exc

$295.00  (27 bids)
End Date: Monday Jul-27-2026 17:06:01 EDT

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1973 Case Cheetah

$465.00  

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VINTAGE CASE XX CHEETAH MODEL NO. 6111 ½ L LOCKBACK FOLDING KNIFE, SHEATH NOT IN

$217.50  (8 bids)
End Date: Thursday Jul-30-2026 19:08:07 EDT

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Case Red Bone 1964 to 1969 USA Era Cheetah 6111 1/2 L Vintage Pocket Knife

$180.00  (1 bid)
End Date: Saturday Aug-01-2026 13:56:52 EDT

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1971/72 CASE XX STAINLESS USA 5111 1/2L SSP Genuine Stag Cheetah

$345.00  (4 bids)
End Date: Sunday Aug-02-2026 15:59:25 EDT

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Case XX 1976 Stag 5111/2LSSP Cheetah Vintage Grey Etch Pocket Knife Near Mint

$297.00  (2 bids)
End Date: Friday Jul-31-2026 11:07:29 EDT

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Case xx Cheetah !!

$9.99  (2 bids)
End Date: Sunday Aug-02-2026 18:08:56 EDT

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