I am looking at buying what I am told is an original 1981 Carlson 16 mercury 115 hP outboard original paint etc. However it is a bright yellow non metallic, with matching bright yellow seat color and the front and rear seat configuration matches more of the 74-76 models but the hull and deck shape consistent with the 1981 c500. Any idea what year and model this may be? Was there a special edition. It doesn't appear to have been repainted: