I have spent the last four days breaking down a huge collection of Russia. It covered the period from very early issues up to 1972. My stock of Russia was already good but I have found several items to fill gaps. The previous owner of this collection had been careful with condition and had sought perf and colour differences among the stamps. There were several imperf versions of stamps, mostly listed in SG. Mini sheets were well represented throughout. I have more Russia to sort but on with other things for now!