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1986 halleys comet 1 oz. 10K proof round 1986 titanic 1 oz. .999 silver proof round Both are from the burton mint. Cannot find any info about them. Checking for a friend the values for ea. Both have all the paperwork etc. and the gold one comes in a very nice presentation wooden box in an airtight. silver one also in an airtite but attached to the COA. Are these at any value above just basic spot melt ? Thanks.