I think you possibly missed the point Kustik is making - the Don army crosses have a completely different style of St.George on the front if you take a look at the link to the images he posted for you to see. The White Armies just used up old stocks of WWI crosses & then went on to the re-designed ones starting again with new numbering & no numbering at all on many. I hate to say it but the version you have is not right at all, I have handled hundreds of these over the years, from early Imperial Russian ones in museums & private collections to Civil War ones. I inherited many from my own family too, when they get tarnished they have a deep shiny colour, not a dull finish - this is the effect of 'ageing' that was common on the copies coming out of Russia & Poland in the last 20 years.
Sorry!