Signaler Felt Scout Badge Blue 1910 to 1928
The Signaler badge has the image of 2 flags with a white "S"
The badge was first issued in 1910 with no white "S", in 1917 the white "S" was added
The signaler badge could be earned by first and second class scouts, as well as Scoutmasters / Leader.
According to Scouting for boys 1908
"The Badge is worn by scout masters on the left side of the hat or cap.
The badge is worn by patrol leaders on the front of the hat or cap.
The badge is worn by corporal on the left arm above elbow with a strip of white braid below it.
The Badge is worn by scouts on the left arm above the elbow. The Badge is worn by first class scouts is the whole badge, only the motto part of the badge is worn by second class scouts"
According to Scouting for Boys 1909
If you were a Boy Scout, this badge was an important achievement and was there for worn on the right arm in between the elbow and the shoulder; this is different to traditional badges of merit which were worn from cuff to sleeve in order or achievement. If you were a Scout Master the badge was worn on the left of your hat / Cap.
To Achieve this badge According to Scouting for boys 1908
The ability to read and send Morse and semaphore message twenty letters a minute.
According to Scouting for boys 1909
Pass tests in both sending and receiving messages in semiphore and in morse. Not less than twenty-four letters per minute.
To give and read signals by sound
to make correct smoke and flame signals with fires
to give the proper signals [as in infantry training] to show the presence of enemy etc