A few good valuable points picked up from a recent RNS of BMV, make of it what you like!
The Gubong mine is a large mine which gives us plenty of scope to re-open and mine multiple areas at one time."
"The Gubong area has been acknowledged to have the potential to develop into a multi-million ounce orogenic gold district. The old mine contains over one hundred kilometres of underground development and more than 6 shafts including 2 verticals"
"This existing development represents tens of millions of dollars of value in today's terms"
" In those days substantial blocks of ore would have been ignored as their grade would have made mining them uneconomic. Many of the areas declared 'un payable' in those days are expected to be economic because of the higher gold price, more efficient mining techniques and better recovery technology"