Hi! The CWC frames that I had, 1946 thru 1955 complete, were all dated by Phil Marshall. On mine the "CW" suffix didn't appear till 1948/49 with no suffix before that. Also in 1948 CWC introduced the seat post clamp with the annular ring on it - a rounded raised ring all the way around the center of the clamp whereas pre '48 clamps were flat. I used to collect AC Gilbert Erector Sets from the 1920s & 30s and Gilbert ALWAYS used up existing stock in the following years sets before they incorporated a new part. I've always assumed that bike manufacturers did the same so maybe a flat seat post clamp COULD be found on a 1948. Well, that cleared up nothing. Make sure there is no suffix after the serial number - sometimes the stamps are light and filled in with paint. If you are going to paint the frame I recommend using Lacquer Thinner to remove the paint on the BB instead of anything abrasive that could damage a light stamping. Also, the suffix stamping isn't necessarily in the same line as the serial number - I have seen them at a 90 degree angle from the SN and sometimes higher up on the BB than the SN line. Bottom line - that is one heck of a find and the chain guard is probably the easiest part to obtain although the Western Flyer models may have used different versions from bottom of the line to top of the line - there was more than one style chain guard available in the '40s. Good Luck and Have Fun! Robert