Most
Westfield bikes from the teens-twenties have more proprietary crank sets, such as a Hartford two piece crank hanger or the double-D one piece crank set.
In heindseit I should have combined this with the sprocket ID thread I posted, if a mod wants to delete that one so this isn't double posted please do. I purchased this from some less than reputable seeming people a few days ago. I met them in a parking lot, and they arrived in a Kia SUV...
thecabe.com
From the
other thread with
additional pictures, it looks like the frame has
oval-shaped chain stays where joined at the bottom bracket.