I don't think anyone can say with certainty. Possibly a 914 utility spear master got put on the 114 utility frame. Possible it was a pattern proto before they decided to use the 114 Ulster pattern instead of the 914 SW pattern. Does anyone have both handy to do a side by side comparison of frames, bolsters, shackles, and pin locations?
The spear blades of my Ulster 114OT and Ulster 114's are the same as my SW SFO 9555 Saw utility knife, which is essentially a 914 with added saw blade. It has the OT style sawcut Delrin covers, and the bolsters, pins and shackle match the subject knife. My 114OT has a long shackle and jigged Delrin covers, unlike the subject knife. However, as you have seen, the 114OT uses elongated oval shielding (like my 2OT and craftsman Ulster 114OTs) as opposed to the more commonly seen OT shield on the subject knife. I've not found an ad or illustration of a 914OT, but that is apparantly what the subject knife is. More opinions and comparisons?