N Wilson Antiques Clocks has dated these Derbyshire Oak Dining Chairs to the Georgian era.
The chairs have a horizontal carved and arched splats which have been deeply carved.

The supports to the splats are also superbly carved to the top and have lovely applied half turnings.
The legs to the front are beautifully turned and joined by a turned stretcher. The legs to the sides are joined by double plain stretchers and the rear are jointed by plain stretchers making them nice and sturdy.

As you can see from the photographs these chair are a superb rich color.
The approximate MAXIMUM dimensions are:
17 1/2 inches (45 cm) wide.
18 1/4 inches (46.5 cm) deep across chair and 14 inches (35.5 cm) deep across seat

39 3/4 inches (101 cm) high to top of chair and 18 3/4 inches (47.5 cm) high to top of the seat
There are slight variations in the dimensions due to the handmade nature of these chairs.
AGE: The chair are Charles II chairs and date to circa 1760 / 1780.

CONDITION:
The chairs are is in nice condition as can be seen from the photographs especially considering the are over 240 years old, but as with any piece of antique there are knocks / marks / shrinkage lines commensurate with age and use but this just adds to the rustic charm of these chairs. There are also some long dead woodworm holes as would be expected with antique chairs of this age.
N Wilson Antiques Clocks has dated these Derbyshire Oak Dining Chairs to the Georgian era.
You can view the stock and full dealer information on the N Wilson Antiques Clocks Profile Page