There have been some questions lately concerning how to determine the year of certain Zenith bicycles that were built by CCM for the Marshall Wells department store chain. I posted a chart that outlines the letters assigned to CCM bicycles between the years 1921 to 1960. For those of you who are interested in my connection to CCM built Zenith bicycles check out my post on my 1935 model.
It took a little bit of sanding on the frame of my 1935 model to actually find where the numbers are stamped. I finally recovered the numbers on the left side of the seat tube at the very top of the tube were the seat post slides in. My number was fairly well stamped and with a little bit of sanding it was readable. I am unsure if all frames are stamped this well. The number on my model is X4076. According to the chart there are up to 5 numbers that follow the initial letters between the years 1921 to 1936. I am assuming because the bike was under the 10000 produced amount I only have 4 numbers.
I located the serial number chart awhile back on the internet. I am unable to give credit for it where credit is due.