1 kopeck 2006 Russia SP, variety 4.12A, from circulation
Designation "4.12A" according to the special catalog of A. Stashkin, regional. Reverse: the ornament is close to the inscription, the curl does not touch the piping, the shackle above the Y touches the letter. Obverse: The letters SP are large.
SP - (сп) under the horse's hoof - Saint-Petersburg Mint
Collectors collect circulation coins by year and mints. Ciculation coins cost's higher than it's nominal value, because In some region of Russia can be rare coins with particular year, in other region - other year. For collectors it is hard to be in all regions...That is why collectors buy them to make their collection full.