djkam
Jr. Member
- Joined
- Feb 27, 2007
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- Location
- friesland netherlands europe
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- garrett gtax750
here is the result of the cleaning, 2 out of 3 are determinable now, so thats a progress.
one has been made in utrecht between 1657 and 1659, the second, the hollandia is dated 1702 and has a standing lion holding a lans on the backside, the utrecht-one has two lions on the backside holding the weapon of utrecht, the third is still a questionmark.
i cleaned them in 3 steps: first i removed the mud and so by using a ultrasonic cleaner, second i used electric current, a small 12v psu at 0.3a, coin at the - and an iron nail at +, for the liquid i used half a glass water, added 1 spoon salt and filled it up with vinegar, within 10 minutes they were clean, finally i brushed them gently with a mini-tool brush (i would-not do that with expensive/rare coins).
i used different kinds of light to get a reasonable picture, in real they look even better!
thats all, h.h djkam
update on the unknown coin, i met an expert this morning who checked it, its a Frisian oord dated 1724 or earlier
one has been made in utrecht between 1657 and 1659, the second, the hollandia is dated 1702 and has a standing lion holding a lans on the backside, the utrecht-one has two lions on the backside holding the weapon of utrecht, the third is still a questionmark.
i cleaned them in 3 steps: first i removed the mud and so by using a ultrasonic cleaner, second i used electric current, a small 12v psu at 0.3a, coin at the - and an iron nail at +, for the liquid i used half a glass water, added 1 spoon salt and filled it up with vinegar, within 10 minutes they were clean, finally i brushed them gently with a mini-tool brush (i would-not do that with expensive/rare coins).
i used different kinds of light to get a reasonable picture, in real they look even better!
thats all, h.h djkam
update on the unknown coin, i met an expert this morning who checked it, its a Frisian oord dated 1724 or earlier
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