Hello
Please check
viewtopic.php?t=62455
The final image posted by Peter includes the marks for 90/900, 80/800 and 60/600 purity. There is no 700
I don't know much about the degrees of fineness in Egyptian silver but, is it possible that there has been some confusion about 600 and 700 because the "European" symbol for 7 is more or less the same as the Arabic symbol for 6?
Perhaps at some point 600 was read as 700 and accepted as fact
What do others think?
Damon