A lot just doesn't seem right or typical to me, about this one. The absence of a pattern number in a knife with a '65-'69 tang stamp (it looks OK for the period - I'll assume that's genuine), suggests at least one blade has been removed from whatever(?) the knife originally was, OR the knife was pre-1950 (before pattern stamps were included) and later fitted with a newer blade. Pattern stamps are often on secondary/tertiary blades, apart from the date stamp on the main blade's tang.
The frame shape doesn't look like anything I can find in the collecting guide I have. The secondary blade looks like a spey - but again, the handle shape doesn't look like any stockman/cattle knife I've ever seen, with a round(ish) bolster at one end and a squared bolster at the other. And one of the cover pins (above & left of the shield) looks WAY TOO CLOSE to the edge of the cover, which suggests to me that the handle itself has (maybe) been reshaped at some time. All these things in combination, including the shield that appears to be upside down, suggest a knife that was maybe cobbled together from parts of others and otherwise pretty radically altered.
Also wondering if the pinned(?) shield's pins are actually visible from inside the liner - the pin ends should be visible in pin holes drilled through the liner, looking from the inside. If no pin holes are there, that suggests the pinned shield was pulled from something else and glued(?) into the cover on this one.