Here is a paragraph that Michael and I worked up on the X series a few years ago on the 24OTX. The Missing X series knife Michael spoke of does exist. The XT4 is incomplete. We have a blade blank but no handles. We have a shortline artist drawing but sadly none have surfaces completed.
Michael's paragraph..
The first X-Timer well look at was a SFO from Wal-Mart. Not seen elsewhere, and not distributed to all Wal-Marts, the 24OTX was the smallest X-Timer, and really an updated traditional slip-joint design, rather than an entirely new one. Built on the 3 5/16" frame of the 34OT Middleman stockman, the 24OTX used the same 2 ½" clip master blade, but instead of having sheepfoot and spey blades, used the 1 3/4" pen blade from the 33OT set in the other end, as with the smaller 104OT Minuteman predecessor pattern. This resulted in a slimmer profile, both blades operating with a common backspring. The scale shape of the 34 and 24 is exactly the same, however the 24OTX was left smooth, without the sawcut texture familiar to Old Timer owners since 1958. A special brass shield proclaims the identity X timer, and complements the brass scale and spring pins, brass bolsters and liners. The Schrade+ stainless blades, which I first thought to be gunblued, I have since read are titanium nitrate coated, commonly called tit-nit. The tang stamp is SCHRADE+ over U.S.A. 24OTX. All together, it is an uncommonly appealing design, and only produced for a short while and for one retail merchandiser, an uncommon Schrade. I believe this will be a sleeper among future collectibles.