Again!! I See Silver? :) Very Crusty?

It couldbe silvered. Reminds me of Barbrous minims, but they werent silvered. I'm guessing some sort of fourree or jewellery piece from the period.

If you take a pin, wear through the crust on the edge nd make a tiny test cut to see if its silvered or more substantial. If its got a good thick layer on, go with Echizento's suggestion and leave it in lemon juice (give it a good vigorous scrub too). Distilled Vinegar (Glacial) works well too, but keep an eye on it and regulrly scrub it.

Another thing you could try is saturating it in DW and freezing it. Might be enough to break off the dirt.

3 options - let it thaw, see if the ice was enough to break it up - throw it in boiling water and see if the thermal shock breaks the dirt (this could break off silver plating of a fourree though) or try and yank off the ice, which could also pull of silver plating.

I tried the quick routes... and the coin still looks exactly the same.
Will give it a go with the lemon juice... looks like it will be quite a while before I unravel this mystery :)

Thanks guys

Maybe this coins is going to be a good training course in 'picking'
I so far have not picked at all at my coins, just brushed.

Would it be suicidal to use a pin and see if I can do it that way? if I am really careful? Just wonder if a pin may be my only chance.
Is it better to pick on a dry coin or a wet coin?

mashisback, I use a pin ususally....give it a practice go. for loose(ish) dirt, I like to hit it when it is "damp"...transitioning from wet to dry. seems to work well...i don't know why.

sorry jess IMHO your coin looked better before it was "cleaned", from the photo it looks as though there is no patina left.

Mash - Please take your time, this would be a classic case to test your patience. Just chuck it in some DW for a while and see what happens.

I don't know, we all sit around talking about how patience is required, it can take months of soaking etc.

At the first glint of silver it's, where is the lemon juice, stick it in the freezer just waiting for "hit it with a dirty great big hammer..."

Yes, taking your time is the best way to do it. The postumus is a silver coin and silver tones and it was a dark color but shines like a silver coin now. I tried a few cleaning methods back then and had some fun but ruined a few coins too...this coin actually turned out pretty nice. Most coins will clean up good after lots of time and multiple cleanings. :)