Lots of us have boxes of boxes put away. Most do fold flat for storage. I have two of the 89OT's, both are "SFO's", special factory orders. One is a Skoal promotional with green delrin handle, and the other is a Copenhagen promotional with a black delrin handle. Both have custom coined brass shields, blade etches, and unique tangstamps:
SCHRADE
COPE U.S.A.
SCHRADE
SKOAL U.S.A.
I am not sure of the years the promotion ran, but the 89OT itself was in production from 1989 -1999, eleven years total and discontinued six years ago. Of course you know it is basically an 8OT with the sheepfoot blade scalloped. I haven't had an opportunity to use them, but they are nice knives. The 89OT was the only modification to the 8OT that I am aware of.
Codger