QUOTE(grivna1726 @ Dec 25 2007, 04:07 PM)

Your wording suggests that this is not an established fact, but an inference made based on other known information.
I do not know enough about the origin of these medals to make an intelligent comment. My guess is that the medals were made at the Mint. If I am correct in that belief, then perhaps there are archival documents which would establish whether the coin is based on the medals, or the medals on the coin.
In the case of Dassier's portrait of Elizabeth Petrovna on the Moscow University medal of 1756, the sequence is known and it is clear that the 1757 rouble portrait was based on the 1756 medal rather than the other way around.
The Alexander II medal is particularly pleasing due to the (expected) higher relief of the medal design relative to the coin and is therefore more esthetically pleasing than the coin itself.
You are correct that the above is an opinion. However, the Dassier example is not relevant because
of the way dies were made in 1757 and 1898. The 1756 University medal, as you state, was the inspiration
for the 1757 rouble but in this case a new bust hub had to be cut by hand.
In 1898 the Imperial Mint used a reducing machine to cut hubs and dies. Under this type of die production
it was very easy to produce medal dies after those for coins had been made. It would also have been relatively
easy to erase the denomination from a master hub to create working dies for the medals which were the same
size as the coins. For medals of differing sizes the original galvanos would have used with the denomination
removed. (A galvano is a copper shell which duplicates the original clay artwork prepared for the coin dies.) It
is possible that in 1898 the reducing machine used at St. Petersburg did not create a full die but rather partial
hubs but if so this would have delayed medal dies by only a few days.
I would agree that the medals in question were struck at the Mint as the dies clearly were made from the original
models.
RWJ