GMK would be my starting point.
Several years ago I bought a new Tikka T3 from a small gunshop that was closing down. The rifle, I was told, had been in the shop for several years from new and had remained unsold. One phone call to GMK with the serial number and this information was confirmed by saying that the rifle was sent to the specific gunshop in question new from GMK, they also gave me the date that the rifle was sent from GMK to the shop.