Lucky you, Nice knife! I'm the reverse, I finally found the 120 and am looking hard for the 119 as the only one needed to complete the set. Given the quality of most pictures on the bay, they are hard to pick out with the dark spacers blending in with the phenolic handle.
I know this gets discussed ad nauseum, but I don't see how the 119 and 120 could have followed the conventional pattern of 3 line 2+2 upright being 1973 to 1980. The 3 line inverted and the later 3 spacer are relatively easier to find in the 119 and 120 and they are supposed to be one year transition knives in 72 and 81. Both those patterns had to have been made much longer than 1 year with the 3 line upright 2+2 spacer being a short lived transition between the two.