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 gun was made by SKB in Japan and imported by Ithaca, starting in 1966. I don't know when your particular gun was made.
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.
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