Gilbert Catalog
Price in 1949: $5.95
Arm goes down, light to red, to stop train. Arm raises, light to green, to go ahead. Provides automatic block system control of two trains. 7 3/8" high. $5.95. Denver and west, $6.25.

Price in 1950: $5.95
Can be wired to provide an automatic block system control of two trains on your layout — just the way real railroads safeguard their runs! When train nears, blade drops and light turns red. Then blade raises and bull's eye shines green "go-ahead." 7 3/8".
Prince, $5.95. Denver and West, $6.25.

Price in 1951: Unlisted
Safeguard your trains the way real railroads safeguard their's! Semaphore can be wired to provide an automatic block system control of two trains; when train nears, blade rises and light turns green. After train posses, blade drops and bull’s eye becomes red, automatically causing "dead block" to halt following trains. Stands 7 3/8" high.

Price in 1952: Unlisted
Safeguard your trains the way real railroads safeguard their's! Semaphore can be wired to provide an automatic block system control of two trains; when train nears, blade rises and light turns green,. After train passes, blade drops and bull's eye becomes red, automatically causing “dead block" to halt following trains. Stands 7 3/8" high.

Price in 1953: Unlisted
Safeguard your trains the way real railroads do! Semaphore can be wired to provide an automatic block system control of two trains; when train nears, blade rises and light turns green. After train passes, blade drops and bull's eye becomes red, automatically causing "dead block" to halt following trains. Stands 7 3/8" high.

Price in 1954: $6.95
Safeguard your trains the way real railroads do! Semaphore can be wired to provide an automatic block system control of two trains: when train nears. blade rises and light turns green. After train passes, blade drops and bull`s eye becomes red, automatically causing "dead block" to halt following trains. Stands 7%" high.

Price in 1955: $6.95
Safeguard you trains the way real railroads do! Semaphore can be wired to provide an automatic block system control of two trains; when train nears, blade rises and lights turn green. After train passes, blade drops and bull's eye becomes red, automatically causing "dead block" to halt following trains. Stands 7 3/8" high.