It all depends. Being a first day of issue makes it worth more than just the 3 on cover.
There are some things to look for. Look closely at the 3d and see if there is an Apostrophe after the second "E" of GEORGE, if, by chance there is that alone is priced over $100. That aside the set is worth £55 in my Stanley Gibbons book and times that by 4 on cover.
Very nice cover!
re: FDC of Australia Silver Jubilee
It all depends. Being a first day of issue makes it worth more than just the 3 on cover.
There are some things to look for. Look closely at the 3d and see if there is an Apostrophe after the second "E" of GEORGE, if, by chance there is that alone is priced over $100. That aside the set is worth £55 in my Stanley Gibbons book and times that by 4 on cover.
re: FDC of Australia Silver Jubilee
Very nice cover!