Thanks again all for the replies and I find this rather interesting!! I guess I opened a can of worms here

... I knew prior to posting this and based on reading threads on different forums that the 'Peanut" Jack is one of those knives that is not so clear in definition and certainly one in which folks seem to like it or hate it - for whatever reasons.. Quite frankly I don't collect Peanut Jacks but fell on this one that I wasn't going to leave based on price & what I like for the collection as well as being in excellent condition... and I am the first to turn away from celluloid handles except in special circumstances like this.
I am basing my referral to this knife as a Peanut Jack based on my reading of Levine's 3rd edition... I am attaching clips on his reference to Serpentine Jacks - note he mentions Peanuts are 2 3/4"
or so in length (note he references jacks as being between 3/1/4" to 3 3/4" in general) and refers to them as having rounded or pointed ends... to that note see the "Peanuts" he has as examples which have a pointed or rounded end - and in fact go up to 3 & 1/8"... clip or spear blades as well... along with a pen blade.
I know Case produced a Peanut that was defined as 2 3/4" and Steve had this in his excellent book on Case knives... maybe that is how folks define a Peanut - by the Case Peanut as it has been sold as such and documented. In other threads on other forums I gather that Peanuts and doglegs are in fact one of the same but all fall under Serpentine Jacks... bigger Peanut Jacks being called Jumbo Peanuts... etc etc... but I found no great definition on a Peanut anywhere which prompted this thread... not the knife per se...
I understand why some folks think a Peanut should have rounded ends - it is supposed to resemble the agricultural legume... which had me thinking about the bag of whole roasted peanuts I ate at Fenway Park a week or so ago

... so check these 2 photos - a peanut with a pointed end and a rounded end

- Peanut with pointed end.jpg (135.61 KiB) Viewed 5536 times

- Peanut with rounded end.jpg (100.9 KiB) Viewed 5536 times
All fooling around aside - I was hoping this thread would serve as a reference point for folks who are searching for information on Peanut Jacks... I know I have not been in this game as long as many of you but in the last year I have added to a collection of knives that started 50 years ago with a gift from my uncle (which quite frankly is a Puma Jadgmesser with a 1965 serial number - the year he gave it to me - probably worth more now than any other knife I own from my understanding) - except I only became more interested in evolving my knives to a certain degree in the last year and the collection expanded exponentially. I can tell you that AAPK no doubt serves as a great reference for the beginner or more experienced as well!! When I started to search various knife topics I no doubt ended up on AAPK sooner than later... many threads on AAPK are informative from many aspects and serve as a great reference!!
I would like to see this discussion continue and would love to see photos of other knives that are considered Peanuts or even doglegs - I don't have any other Peanut Jacks and quite frankly may never pending the situation (though I would buy them everyday and all day given the same price and condition of this one I stumbled across)... Other comments as to their rationale and definition of a Peanut - why is it a dogleg rather than a Peanut - or why you like or don't like them would certainly be interesting... and of course anything else anybody wishes to add
Cheers
Lee