Those are the original decals.
Re: the model year, there is some uncertainty about that. The frame was made in 1982. The serial number is KB108541. The high frame number suggests the frame was made in late 1982, but released as a 1983 model. I've always thought of it as a 1982 for some reason and thought I purchased it in 1982. But the evidence is mounting that I bought it in 1983 instead and that indeed, it is a 1983 Nishiki Cresta.