


The number 7 indicates 1977, the number 8 stands for 1978, and so on. After the letter designating the month of production, a number appears that stands for the year of production.

The letter A stood for January, the letter B indicated February, and so on. The additional letter indicated the month the frame was produced. In May 1976, BMX Products began including a letter and a number with the C. Look for a letter and number in addition to the C above the five-digit serial numbers. If there's a C above the serial number on your Mongoose, the bicycle was probably made in early 1976. The letter C stands for Chatsworth, the city in California where the Mongoose was made during the early years of production. Scan the area to see if the letter C is etched above the five numbers.
