![1938 Harley-Davidson Prototype Knucklehead for sale at Las Vegas Motorcycles 2016 as S73 - Mecum Auctions 1938 Harley-Davidson Prototype Knucklehead for sale at Las Vegas Motorcycles 2016 as S73 - Mecum Auctions](https://res.cloudinary.com/mecum/image/upload/v1669823128/auctions/lv16/lv0116-228279/466711_2.jpg)
1938 Harley-Davidson Prototype Knucklehead for sale at Las Vegas Motorcycles 2016 as S73 - Mecum Auctions
Dale's Wheels Through Time - By 1938 Harley-Davidson had refined it's 61 c.i. OHV Knucklehead to near perfection. This beautiful example was restored and decked out in the restoration shop in “Hollywood
![Motorcycle Harley-Davidson EL Knucklehead, 1938 Editorial Stock Image - Image of stuttgart, chic: 70811119 Motorcycle Harley-Davidson EL Knucklehead, 1938 Editorial Stock Image - Image of stuttgart, chic: 70811119](https://thumbs.dreamstime.com/z/motorcycle-harley-davidson-el-knucklehead-stuttgart-germany-march-europe-s-greatest-classic-car-exhibition-retro-classics-70811119.jpg)
Motorcycle Harley-Davidson EL Knucklehead, 1938 Editorial Stock Image - Image of stuttgart, chic: 70811119
![Bonhams Cars : Exceptionally Restored to 100 points,1938 Harley-Davidson EL Knucklehead Engine no. 38EL2080 Bonhams Cars : Exceptionally Restored to 100 points,1938 Harley-Davidson EL Knucklehead Engine no. 38EL2080](https://cars.bonhams.com/_next/image.jpg?url=https%3A%2F%2Fimages2.bonhams.com%2Fimage%3Fsrc%3DImages%2Flive%2F2014-11%2F26%2F9093544-1-4.jpg&w=2400&q=75)