An iron bent in the form of a stirrup, horseshoe, or the letter U with two ends perforated to recieve…
Flag signal for the letter A, error, or the number one.
Signal for the letter B, or the number two.
Signal for the letter C, the number three, or repeat.
Signal for the letter D, or the number four.
Signal for the letter E, or the number five.
Signal for the letter F, or the number 6.
Signal for the letter G, and the number seven.