The Matthews Western Six .22 caliber pistol was manufactured by the Matthews Company, which was based in the United States. The company produced this type of revolver primarily in the mid-20th century, and it was designed for target shooting and small game hunting. The Matthews Western Six is noted for its distinctive design and is considered a collectible among firearm enthusiasts.
5-50 USD or so
No published sn data
Its the size of the bullet that the gun is made for. its the caliber that a handgun uses
FIE.
A 22 LR caliber pistol made by Walther, it is similar in design to the Walther P99.
S&w
It was made by Hi Standard. It's a model Double Nine (DBL9) 9 shot single or double action 22 cal western pistol.
The ONLY .35 caliber pistol I have seen was the Smith & Wesson .35 Automatic. This is a rare gun, and was only made 1913-1921. Sure you don't mean a .25 caliber pistol?
Impossible to answer without knowing who made it and what the caliber is.
No sn data available.
Yes, they made many of them.
Around 1931