ST 70 = 1970 model year 44437 = 2 dr hardtop Skylark Custom KAN = Kansas, Missouri plant 33910 = Production sequence TR 181 = blue bucket seats 20 B = Azure Blue with black top? 12C = Third week in December 1969 06812 W = I found that the paint Azure Blue is marked with an * indicating that it is a special Riviera only color. Does the cowl tag not distinguish that it was a special color? I'm not sure about the "06812 W." It may be options, car does have Pwr brakes, Pwr steering, floor shifter console, remote mirror, A/C.