Queen Victoria's Consort - These are all 'trombones'. They all have cylindrical bore but vary hugely in design. These examples were made in Belgium, Italy and Czech Republic: 6 valve (Sax system)
Amazon.com: Belgian Trombone ID: CDs & Vinyl
BROWNING TROMBONE 22 LR. MFG. IN BELGIUM NEW UNFIRED, NEVER BEEN ASSEMBELED 100% COND. NEW IN THE BOX for sale
Trombone | Dat Music Boi Wiki | Fandom
B.A.C. BAC-TB-PAS Paseo Handcraft Trombone – The Instrument Barn
Valved trombone – 30 for 30
Lode Smeets | Adams Artist
Trombone History: 19th Century (1801-1825) - Will Kimball
A guide to buying your first trombone – John Packer
Amazon.com: Belgian Trombone ID: CDs & Vinyl
Tenor valve trombone hi-res stock photography and images - Alamy
FRANS VAN DYCK
March Of The Belgian Parachutists - Trombone 1 Sheet Music | John R. Bourgeois | Concert Band
History - Trombone
Intermediate Tenor Trombone with F Attachment TB-600 – Jean Paul
Trombone Lessons in Belgium WI - Musika Music Teachers