Martin Signal - train 2 tone signal Horn with 4 horns - Catawiki

Martin Signal - 4 Tone Signal Horn Train - Chromed brass - Catawiki

Ernst Modl brass instruments - Brasspedia

Martin Signal - train 4 tone signal horn - Catawiki

MARTIN HORN 2298 GM-Max B Martin(Made in Germany)

Martin Signal - Two tone Signal Horn with four horns, approx. 1950, Netherlands - Catawiki

Martin Signal - train 4 tone signal horn - Catawiki

Martin Signal - 4 Tone Signal Horn Train - Chromed brass - Catawiki

Martin Signal - train 2 tone signal Horn with 4 horns - Catawiki

Original multi-tone signal horn made by Martin Signal. - Catawiki

Martin Signal - Two tone Signal Horn with four horns, approx. 1950, Netherlands - Catawiki

Martin Signal-two tone Signal Horn with four horns, approx. 1950, Netherlands - Catawiki

Original multi-tone signal horn made by Martin Signal. - Catawiki