I will put the ID and values of each one, even if they were addressed already to have all the values in one place. The coins are organized by first to last picture, and top to bottom, left to right in each picture. You should try to dip the coins with green on them in acetone, or gently use a tooth pick (not sharp end). Where were these coins kept? It appears the green stuff could be due to it being held into or next to PVC. If you need help on IDs of any other coins, you can just PM me.
#1- 1868-BB France 1 franc, .835 silver, 0.1342 troy oz. of silver, worth maybe a little ($1-$2) above melt
#2- 1890 Costa Rica 5 centavos, .750 silver, 0.0289 troy oz. of silver, worth melt value
#3- 1923/1928 Norway 1 ore- $17.50 if 1923, $0.75 if 1928
#4- 1905 Costa Rica 5 centavos, .900 silver, 0.0289 troy oz. of silver, can't see coin well due to glare but it is $3 in XF, and worth melt below XF
#5- Norway 1 ore, can't see date until you dip it or remove the green stuff using a toothpick
#6- 1905 UK 1 penny- $7 in VF, $40 in XF (can't tell which, but looks XF)
#7- 1906 UK 1 penny- $1.25 in F, $5 in VF ( can't tell which
#8- 1891-A France 10 centimes- $8
#9- 1890 UK 1 penny- $2.50
#10- 1912 Canada 1 cent- $4
#11- 1916 Canada 1 cent, can't tell value due to glue damage
#12- 1872 UK 1/2 penny- worth below a quarter
#13- 1899 France 5 centimes- $3 in VF, $8 in XF (looks more like XF, but can't be sure)
#14- 1936 Mexico 10 centavos- $0.75
#15- 1906 Chile 20 centavos, 0.500 silver, 0.0643 troy oz. of silver, worth melt
#16- 1943 Ceylon 1 cent- $0.30
