1906 FN Light Four at the 2022 Barber Vintage Motorsports Museum

 

1952 FN Single sold for $8,250 at the 2019 Mecum Las Vegas Motorcycle Auction

1951 FN M13 Military Motorcycle on display at the Barber Vintage Motorsports Museum -- Birmingham, Al.

1936 FN 500 on display at the Buddy Stubbs Museum -- Phoenix, Az.

1910 FN on display at the San Diego Auto Museum, Ca.

1910 FN on display at the San Diego Auto Museum

1936 FN M-91 for sale at the 2016 Mecum Las Vegas Motorcycle Auction

1902 FN sold for $29,900 at Bonhams 2015 Las Vegas Motorcycle Auction

FN Motorcycle at John Burgin Museum, Spanaway, Wa.

In-line four.  Manufactured in Belgium.