1937 Harley-Davidson 45 Flathead Photo reposted from Facebook from Olav Royneberg #harleydavidson #vintageharley… | Instagram
The 1937 Harley-Davidson Knucklehead - This Model EL features an all-1937 61c.i. Knucklehead engine along with the one-year-only Delphine… | Instagram
![1937 Harley-Davidson Knucklehead Gunning for High Six-Digit Price During August Sale - autoevolution 1937 Harley-Davidson Knucklehead Gunning for High Six-Digit Price During August Sale - autoevolution](https://s1.cdn.autoevolution.com/images/news/1937-harley-davidson-knucklehead-gunning-for-high-six-digit-price-during-august-sale-195194_1.jpg)