The first 222 Sako rifle was L46 introduced in year 1946. This and more from http://en.wikipedia.org/wiki/Sako - you can find a table of models from there. For more detailed information I recommend Arma Fennica book available here: http://www.riistamaa.fi/cat/product_details.php?p=1415 "Arma Fennica suomalaiset aseet" With this book you can find the manufacturing year of your gun by the serial number of the gun.
The value of a Valmet 412's 12 gauge over 30-06 under made in Finland depends on its condition. This gun in mint condition is valued between 600.00 and 800.00 as of 2014.
Value depends on a number of things you didn't mention. The main one is the condition of the weapon. Without more infomation, the best I can do is give you a range of 300-1200 USD. I came across one of these in a gun store it was used but great condition brand spanking new probably it was 1-3 years old it was the only one they had and the reason why because it was 5200 USD.
Numrich, gun shop, gun show, want ad. Brownell's, MidWay USA are a few places to start
Gun Gospel - 1927 was released on: USA: 6 November 1927 Finland: 11 November 1929
The Ithaca saddle gun was made from 1973-1978.It was made by Erma werke,in West germany for Ithaca.
The first 222 Sako rifle was L46 introduced in year 1946. This and more from http://en.wikipedia.org/wiki/Sako - you can find a table of models from there. For more detailed information I recommend Arma Fennica book available here: http://www.riistamaa.fi/cat/product_details.php?p=1415 "Arma Fennica suomalaiset aseet" With this book you can find the manufacturing year of your gun by the serial number of the gun.
The gun was made by SKB in Japan and imported by Ithaca, starting in 1966. I don't know when your particular gun was made.
Remington, Winchester, Sako to name a few
ithaca gun is defunct in ithaca
You have an Ithaca Miner model made in 1907 if it is a sxs double not stated in the ques.
Ithaca Gun Company was created in 1883.
made about 1917
You have an Ithaca Flues model made in 1920 if it is a sxs doubel not stated in your ques.
You have an Ithaca Miner model made in 1907 if it is a sxs double not stated in your ques
You have an Ithaca Baker model made in 1886 if it is a sxs double not stated in your ques
You have an Ithaca Flues model made in 1917 if it is a sxs double not stated in your ques