AJD Antiques has dated this piece to the Georgian era.

They are in excellent condition.
I also have a set of 12 starter/first course knives by the same maker, same date, with slightly different fluted handles if you are trying to make up a canteen.
Size:
Large Dinner Knives - 10.5" (26.5cm)
Small Dinner Knives - 8.5" (22cm)
AJD Antiques has dated this piece to the Georgian era.
Founder of ajd antiques, jonathan dyas has a life-long passion for sourcing and returning to the market an eclectic range of antiques.
You can view the stock and full dealer information on the AJD Antiques Profile Page