jgenn ✭✭✭✭✭

The corrosive effect of seawater causes the loss of metal from both fields and details, probably at the same or closely similar rate. This is different from the loss of metal from circulation, which … (View Post)

Bob Gurney has remarked that a lab grade XRF scan can reveal contaminants that would only be present due to modern refining techniques. Conversely, before the late 1800s silver could not be refined m… (View Post)

Here are the ones that I posted earlier in the thread -- the pictures are no longer available from that site which I will not even bother to name. 1783 silver ducat (48 stuviers), Dutch Republic, Utr… (View Post)

I have quite a few favorites but today I choose this one. (View Post)

I think it's because they are more recent than those documented by Riddell, so not particularly contemporary. True contemporary counterfeits are scarce. Those made for the China trade are plentiful. … (View Post)