yes s/n ends with 3730xx the build(?) paper tag I found behind headlight is dated 2/16/71, dash tag march 71 and purchased 4/13/71. I'd like to see if there is a pattern to the numbers. For now there is 2 march tagged with 3xx and 1 Sept with 9xx. Not enough yet to draw a conclusion, but likely 1st digit is month and then a work day or calendar date for the 2nd and 3rd digits.