I have a Sako in 222 Remington with no model number and I know that some people refer to these as being a "Riihimaki" model including places such as Cabela's simply because that name appears on the receiver next to Sako. However, I know that is a location name in Finland and not a model. I'm trying to determine what the model number is and also an approximate date of manufacture. I believe that it is an early Model L46 as it has a 4-digit serial number of 7XXX. I would post a photo of the left side of the receiver but cannot figure out how to do that with the posting tool asking for an Image URL. Any help would be much appreciated.