SF short for Semaphore.
Semaphore signaling using flags have been with use for hundreds of years. The railway system of up/down arms has been with us since the 1840's. (by railway law, horizontal is the fail safe position of the arms and the arms must tilt to a 45 degree angle, either up or down). A little known fact that is of no use to a J type owner.
Semaphore signaling using flags have been with use for hundreds of years. The railway system of up/down arms has been with us since the 1840's. (by railway law, horizontal is the fail safe position of the arms and the arms must tilt to a 45 degree angle, either up or down). A little known fact that is of no use to a J type owner.If you want to fit semaphores remember to use the commercial version, these had no chrome on them, just the metal painted black. Watch out if your buying some second hand units,as not only do they come in chrome/black finish, all of the smaller units could be 6 volt or 12 volt operation.
I have added two links on the right hand side. The first is to http://www.cartell. ie/
a site you can use to check on a vehicle, you only need the registration number unlike the DVLA site where you also need to know the make. The second site is full of fleet data! enjoy.
The Road Transport Fleet Data Society - road vehicles of the past ...Commercial
vehicles, military, local authority and distribution service vehicles . Picture albums and text lists.A very interesting site enjoy.
