Prototype TI-92 that accepts a zebra module but has no module installed, and has onboard prototype ROM 0.5d23. Has a sticker on the rear in the format of a QA sticker but not a QA sticker. If we assume the format is the same, this would be ID: 15795, CODE: LIFE, S.NO: 42. Additional sticker provides a serial number of 758 over a non-stamped serial number region.