All About Pocket Knives

Actually I have a couple of questions involving the pattern 12031. Ok we will start with handle material. Did this pattern ever come out with any other wood than walnut say ebony? 2nd)Did they have shields? 3rd) Did all have brass liners or did some have steel? 4th) In this era did the screwdriver blade get tang stamped and if so was it consistent? I am looking to you great men of Case knowledge to help enlighten me on this pattern and era. Oh I added some photos of the limited information that I have. Thank you all in advance as I like to learn and gain knowledge. Now I humbly sit at your feet ready to learn.

My knowledge is not all-inclusive, but the ones I have seen all had walnut covers with shields, brass liners, and bails. Never have seen one having screwdriver blade stamped. There is also a three-blade version, 13031LR, with the third blade being a pruning style hawkbill blade. Not sure but don't think the 13031 was made during the Tested era. With Case there are few absolutes, so variants may exist, but I don't recall seeing them. Someone else may have.

Of course, there are non-electricians versions (pen instead of screwdriver blade) of the 031 bare-head jack having bone, slick black, stag, and possibly other cover materials.

Ken

Edit: Collecting Case Knives by Steve Pfeiffer says "The standard liner material for all 31 patterns was brass; however, some older examples from the Case XX era may be found with iron liners and bolsters."