1974 Kenworth W900 startup w/ 350 Cummins! Possible 50th anniversary edition!

This is our 1974 Kenworth W900. It has a little 350 Cummins with a 13 speed. We have been told by several guys that this is a 50th anniversary truck because of the gold emblems. We aren’t sure though because our truck is a ‘74 and anniversary edition should be ‘73 according to math as the first Kenworth was in 1923 (google). So if anyone knows and can tell us if we have a 50th anniversary please let us know in the comments. This truck has an aluminum frame with torsion arm suspension. It needs some work but is a very solid old truck that runs great!