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- Mar 15, 2000
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I see where george65 just posted a knife shaped similar to an old one that I own (even in terms of grind). His knife was made by Miller Bros. and can be seen in the "Old Knives" thread. Thanks, George.
For comparison, here is the version of the serpentine jack (or dog-leg jack) I have:
Here is the very useful post by Thomason (quoting Levine) that helps with the nomenclature:
I really like the blade grind in these two old knives as well as the size/shape. Anyone aware of a modern counterpart? Any company still making a knife in this pattern?
For comparison, here is the version of the serpentine jack (or dog-leg jack) I have:

Here is the very useful post by Thomason (quoting Levine) that helps with the nomenclature:
I agree, it's the shape that makes a peanut.
Some bits and pieces from page 185 of Levine's Guide 4th edition.
Several standard jack knife handles have a more or less S-curve shape. Sometimes called serpentine jack.
Unlike premium jacks, serpentine jack usually have their blades in the narrower end.
The small 2 3/4 inches or so round-ended serpentine jack is now called a peanut. Larger round end serpentine jacks are often called dog-leg jack.
So I would say a peanut is a small serpentine jack with a rounded head end.
I really like the blade grind in these two old knives as well as the size/shape. Anyone aware of a modern counterpart? Any company still making a knife in this pattern?