It is a 1974 tool kit. The belt is not an original, either Phoenix or Optibelt would be used in those. It is not an unmolested tool kit so hard to tell, could have been the first version of 1974 tool kits with a June 1973 fan belt code, no tow hook, and 2 blades only for the screwdriver. But it is not a full original so it could be 1975 tool kit with missing items too. Should go for $800-$950 if you add the missing 2 tools you have mentioned.