![Bonhams : Offered from the National Motorcycle Museum Collection, 1951 Triumph 649cc 6T Thunderbird Frame no. 15758NA Engine no. 6T 15758NA Bonhams : Offered from the National Motorcycle Museum Collection, 1951 Triumph 649cc 6T Thunderbird Frame no. 15758NA Engine no. 6T 15758NA](https://images1.bonhams.com/image?src=Images/live/2020-10/15/25013911-16-6.jpg&top=0.370000000000&left=0.140000000000&bottom=0.930000000000&right=0.843333333333&height=430&quality=90)
Bonhams : Offered from the National Motorcycle Museum Collection, 1951 Triumph 649cc 6T Thunderbird Frame no. 15758NA Engine no. 6T 15758NA
Triumph Motorcycles - 1949 Triumph 6T Thunderbird. 650cc. 34bhp. Four-speed transmission. Top speed of 100 mph. To celebrate our 110th Anniversary, we're featuring classic models from Triumph's past. To learn more about
![1951 triumph thunderbird - Google Search | Triumph motorbikes, Triumph thunderbird, Triumph motorcycles 1951 triumph thunderbird - Google Search | Triumph motorbikes, Triumph thunderbird, Triumph motorcycles](https://i.pinimg.com/originals/d3/23/8f/d3238fc902524d8edb38103d2d85508a.jpg)