I have a Diamond Back Topanga (non-suspension) that I got from a friend. According to the labels on the bike it was distributed exclusively by WSI of Camarillo CA, 93010. It is "Avenir equipped" and a "CR-MO steel fork blade." It has "4130 CR-MO Main Tubing." It is the color black and it says made in Taiwan. The Serial Number is: J90414513. What year is my Diamond Back Topanga and which model is it? Anyone?