Sujet
A Semaphore Signal on an American railroad
Légende
Illustration depicting a Semaphore Signal on an American railroad. One arm governs several tracks, the number of the track which is clearly shown on the indicator disk. The safety position was with the blade at 60 degrees in the lower quadrant. Dated 19th century
Date
19e siècle
Crédit
Photo12/Ann Ronan Picture Library
Notre référence
ARP23A18_314
Licence
Droits gérés
Format disponible
60,0Mo (9,7Mo) / 34,0cm x 44,2cm / 4014 x 5224 (300dpi)