Knucklehead V-twin power makes the 1938 Harley-Davidson EL collectible 80 years on | Hemmings
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
1938 Harley-Davidson Model EL "61" With Factory Sidecar | Gooding & Company