Well I got one, not sure if it's the same as was at the eBay auction here. Mine was from a US seller. The medal is silver, and rings well. I took it to the Denver coin show, and had a few people look at it. They did not find it repulsive. One dealer had a portable spectrometer, and indicted that this is silver with alloys that he has seen in old silver. The edge is very sharp, ring struck.
The weight is about 23 grams, which makes it Diakov 243.9. There is also Diakov 243.7 which weighs in at about 30+ grams, and Diakov 243.3 weighing in at about 50 gr. I do not have the Diakov catalogs, but curious to find out what's listed under the other numbers.