Thomas George Stiles Co.
Thank you Brian Duarte for forwarding this 1926 ad .
Of special note, the ad features a mechanical low compensating semaphore dwarf . and clearly shows the "ACL" version type
spectacle 24-42 vs the more common 24-46 pattern spectacle .
The image shows the back of the signal, while not the best image it shows the one piece escapement jaw back spectacle
a much older design than the single back spectacle and single escapement Jaw.
Thomas George Stiles Co.
Thank you Brian Duarte for forwarding this 1926 ad .
Of special note, the ad features a mechanical low compensating semaphore dwarf . and clearly shows the "ACL" version type
spectacle 24-42 vs the more common 24-46 pattern spectacle .
The image shows the back of the signal, while not the best image it shows the one piece escapement jaw back spectacle
a much older design than the single back spectacle and single escapement Jaw.