Hi
@49deluxe
And Welcome.
As
@Archie Sturmer said, it's a Westfield made Elgin for the Sears and Roebuck catalogue company.
The D2 code says the frame was made in February 1937, but then it sat in stock at the factory until January 1938 when the bike was built up and allocated the serial number C6414. The serial numbers in 1938 started at C5000 on 3rd January 1938, so yours would have been built only a few days later.
It is an unusually large gap between the frame being made and the bike being built, but it was a rough period for Westfield as they were coming towards the end of their Elgin contract, and you do see some strange gaps like that.
Best Regards,
Adrian