Meriden was formed by Sears Roebuck to make guns for Sears in 1905. Their products were well made, but in general do not command extremely high collector prices. Meriden ceased production about 1918-1919. See the link below for a history of the company and its products. Without knowing make, model AND condition, we cannot really guess at a price for a gun. Sorry-
A barrel with a full choke.
You can shoot slugs in a double. Slugs are best shot through a cylinder bore or improved cylinder choke. The tighter the choke, the more they will be disrupted. There is risk of excessive wear and damage through a tight choke--tighter than Modified Choke.
It is possible to fire a shotgun without a choke, but it is highly not reccomended, and they don't cost that much If you select a barrel with no choke (cylinder) it will cause the pattern to be looser than for a barrel of a shotgun that has a tighter choke. The extreme is "full choke" which keeps a tight pattern out to the effective range. Full choke is typically used for waterfowl. A shotgun that is pressed into double duty (shot for small game and slugs for big game) would work well to have modified choke. Slugs have to be designed to fire through a full choke without blowing the barrel but you will certainly shorten the life of the barrel by firing slugs through a choked barrel. If you can afford an extra barrel, then use a cylinder (no choke) for slugs. Remington and other shotgun manufacturers have interchangeable choke tubes (see link) that allow you to screw in the appropriate choke for your quarry.
Being a double barrel has no bearing on what the choke COULD be. While MOST are full/ modified. it could be any, or none. Shotgun ChokeYardageShotgun Choke Restriction Diameter difference between bore and shotgun chokeCylinder< 200Skeet22.5.005 of an inchImproved Cylinder25.010Light Modified30.015Modified32.5.020Improved Modified35.025Light Full37.5.030Full40 or More.035Extra Full40 or More.040
If you mean a choke bored barrel, it designates the amount of constriction a shotgun barrel has.
At the end of the barrel
choke of sears model 20 12 gage plain barrel shotgun has 3 stars on barrel
It depends on if it's single barrel, double barrel, or pump. Anywhere from $75 to $200 for the single, $125 to $300 for the double, and $125 to $250 for the pump, used, in 2012.
They came in various barrel lengths and choke combinations. If it is not marked on the side of the barrel, you will have to pattern the shotgun to determine the choke
A shotgun barrel with a cylinder bore choke.
The amount of constriction at the muzzle
It is possible