This carving set is really old. It is made of forged steel with genuine horn or tusk handles. They look more ferocious than stag. Rather fierce looking. I have never seen deer antlers with such ridges so the horn could be from some other animal altogether. The whole set looks like it could have been used in Henry VIII's kitchen.
All three pieces are marked with the crossed swords inside a shield and H. G. Long & Co. Sheffield. The knife is also marked 'Cross Daggers'. Looks like it could do a number on a roast.
All three pieces have turned a dark gray with age and the handles have varying degrees of patina on them. The sharpening steel and fork feel like ivory (I don't think they are) and the knife has a brown look and is the most worn. I'd guess it was the most used piece and the color is the result of bloody hands on the horn.
I have done nothing to them but wash off the surface soil. They are solid and I'm guessing someone with the appropriate expertise could make these very usable. I am selling them for the antique value. They'd make great props in a period film. The measurements are as follows: Knife--15 inches long (blade is 8.5); Sharpening steel--14 inches (steel is 8); fork--12 inches (steel is 6).
Date is sometime after 1911. The company is still in business but these are obviously not recent.