Replacements for '39-'48 usually do not have the ground lug which makes them easy to spot as a replacement, not to mention the colorful plateing and blue lid. If I look for long enough there may be a functioning original or period replacement to do the job. New really looks out of place on my car. Sal is looking for a cutout style for a three brush which seems more common locally, but the electronic replacements are considered an improvement compared to a cutout. Good luck: Fred A