"This 1958 Triumph Thunderbird is typical of Von Dutch’s work for customers in the 1950’s and 1960’s... This Von Dutch Triumph is largely original, never restored. The paint is likely nitro cellulose lacquer and has therefore dulled a bit over the decades. You can enjoy the Von Dutch Triumph and many other custom bikes from all eras when you visit the National Motorcycle Museum." http://www.nationalmcmuseum.org/1958-triumph-thunderbird-by-von-dutch/
The National Motorcycle Museum has one of Evel Knievel’s Harleys, the “Captain America” chopper authenticated by Peter Fonda as the bike from the 1969 watershed movie Easy Rider, and many other iconic machines. The “Best of the Best” gallery has Curtiss, Flying Merkel, Crocker, Brough Superior, Henderson and other classic motorcycles on display.
https://www.motorcycleclassics.com/classic-motorcycle-touring/the-national-motorcycle-museum
A walk through the Harley-Davidson Museum® is a walk through the history of America. With an unrivaled collection of Harley-Davidson® motorcycles and memorabilia, a 20-acre, park-like campus, and a calendar full of activities, the H-D Museum™ is one of Milwaukee’s top tourist destinations for visitors from around the globe. A visit to the H-D Museum™ is an experience that will stay with you for a lifetime.
https://www.harley-davidson.com/us/en/museum/visit/visitor-information.html