In the late 1960s a number of new items of webbing were quietly added to the stores catalogue to go with the 58 pattern web set. These were items for use by the SAS and were pieces of equipment that were felt to be useful based on operational experience and some experiments in unit with producing similar pieces of equipment unofficially. None of these items of SAS webbing are easy to find now, however the most common piece to come across today is the altimeter pouch.
The altimeter pouch is a small green webbing pouch for carrying an altimeter, the SAS had been operating in jungled mountainous terrain in Indonesia and Borneo and an altimeter was very helpful in determining a troopers height in this rugged landscape and how far up a particular mountain they had actually gone. The altimeter was small and round, so the pouch was shaped accordingly:A box lid fits over the altimeter and is secured with a single press stud, keeping the contents safe and secure within:Due to the size of the pouch it was impractical to have it mounted on the belt itself, so a pair of one inch drop straps allow it to hang below the waist belt:The large eyelet is to allow a lanyard to be fastened, securing the altimeter to the pouch and preventing it being dropped and lost. Underneath is the faint markings of a stores code and date, it seems to have been made by MW&S in 1982:I have struggled to find much further information on the pouch, presumably due to the secretive nature of special forces there is not much out there on the pouch. I did however come across this photograph which I believe is a 1980s photograph of an SAS belt kit set up (the site I found it on is in Polish so I have no context I can give to the image). Here the altimeter pouch can be seen on the belt, but it is being used to carry a compass:If anyone has any pictures of the actual altimeters used with this pouch, please get in contact as it would be interesting to see what is supposed to fit inside the pouch!