Love it
Haraka 
Paying Guest my Medals Year Book says that around 30,000 Silver Jubilee Medals were awarded, but of course that includes those awarded to police and other services, as well as members of voluntary organisations etc. The medal is certainly of a better quality than the cheap and nasty Golden Jubilee Medal I referred to above, but it was the first to use the obverse with The Queen wearing the rather "top heavy" St Edwards crown, which was also used on the South Atlantic Medal.
air pig - Thanks for the info on the nav brevet.