What is the age of my columbia clippe bicycle, maunfactured by westfield Mfg.?
Welcome aboard.

Normally frame / serial numbers are few and far between and often get overlooked on here because normally they don't lead anywhere.

However in this case as it's pre-war and you had the basic info needed (Westfield, Columbia, Clipper) the info was actually quite easy to track down.

Thanks to a guy called Mercian over here at The Classic &amp; Antique Bicycle Exchange

It appears "B" was the date letter for 1935 (you need to scroll down a lot on the page i linked) 

Some great info and images of various Westfield Columbia's, good luck with the restoration

Thanks to @Andrew below for the following link.

Columbia Manufacturing FAQ