I used to read several studies on authentication of platinum coins. They have different and sometimes misleading info in them. One of the latest studies:
http://www.platinummetalsreview.com/dynami...ew/50-3-120-129Study showed that identification "... requires consideration of the whole of the impurities present in the coin not just the iron. This means that just using the analytical results from an energy dispersive spectrometer(EDS) attached to a electron-microscope is insufficient. The poor limits of detection on this instrument do not allow the measurement at low concentrations of a number of important elements".
Now spectrometer is not good enough, but it was used to authenticate platinum coins just till now.

Also different studies had different results on impurities, some of them showed that counterfeit coins had less iron and more gold in the alloy, some of them that counterfeits were made of almost pure platinum, etc. All that is very misleading.
The problem with ALL these studies is that there is no statistical approach in any of them. So the results vary widely. For really trustable study hundreds of platinum coins needed and noone can get that many.
About 10 Rubles with wrong mintmaster initials. Those are made EXTREMELY well as if they are made at the mint. Russian guides (like Adrianov) say these are "possibly counterfeits", but not for sure. There is another theory that those are Novodels minted in 1920-s and made with available at the mint at that time edging (with wrong letters of mintmaster for the year).
The cost of authentic 1912 Borodino Rubles in 1980-s was about $100, huge money at that time considering monthly salary of an Engineer about $30/month (120 Rubles / 4 Rubles per dollar on black market). And in the early 1990-s salary dropped to $10-15/month since dollar rose sharply. So at that time making counterfeits was may be the same profitable as in our days or may be even more profitable.
With all this on mind, just low quality picture does not seem to be appropriate to use for authentication of such complex and not easily distinguishable (even with prompt equipment) coins.
WCO