This is a Staunton set.
The set is a reproduction of a Staunton model of 1851, the original set was made in ivory.
The Staunton sets appeared in 1849 and quickly become the standard.
1851 was an important year because of the London International Tournament, which was the first International chess tournament.
As the London International Tournament was organized by Howard Staunton it is mostly sure that a Staunton set was used.
And an ivory set was part of the tournament prizes (From the Staunton book: The Chess Tournament: A Collection of the Games Played at this Celebrated ... https://books.google.es/books?id=_SUCAAAAYAAJ&dq=1851%20london%20tournament%20book%20staunton&hl=es&pg=PR24#v=onepage&q&f=false):
NUMBER AND AMOUNT OF THE PRIZES. (apter deducting all necessary expenses.)
pirst prize. The First Prize will consist of a sum not less than onethird of the net amount of the funds collected.
SECOND PRIZE. The Second Prize will consist of a sum not less than onetenth of the net funds collected.
THIRD PRIZE. The Third Prize will consist of a sum not less than onefourteenth of the net funds collected.
FOURTH PRIZE. The Fourth Prize will consist of a sum not less than onetwentieth of the net funds collected.
FIFTH PRIZE. The Fifth Prize will consist of a sum not less than onethirtieth of the net funds collected.
SIXTH PRIZE. The Sixth Prize will consist of a sum not less than onefortieth of the net funds collected.
SEVENTH PRIZE. The Seventh Prize will consist of a silver cup, with com memorative inscription ; or, at the option of the winner, of a sum not less than one-sixtieth part of the net subscription.
EIGHTH PRIZE. The Eighth Prize will consist of a large (club size) set of ivory Chess-men, with ' suitable Chess-board, inscribed with the winner's name and victory.
So, possibly they could have used a 1851 for the prize.
The tournament was conceived and organised by English player Howard Staunton, and marked the first time that the best chess players in Europe would meet in a single event.
Adolf Anderssen of Germany won the sixteen-player tournament, earning him the status of the best player in Europe.
He also won the rival London Club Tournament done afterwards.
As a result of winning this tournament Anderssen was popularly recognised as Europe's best player, although as far as is known he was never described as "world champion".
The idea of a world chess champion had been current at least since 1840, and the earliest known use of the term "world champion" is in 1845,
referring to Staunton and published in Staunton's Chess Players' Chronicle. Wilhelm Steinitz was widely recognized as "world champion" in the 1870s,
but the first formal contest for the world title was the 1886 match between Steinitz and Johannes Zukertort.
The famous Immortal Game, Anderssen–Kieseritzky, London 1851, was played as an offhand game during a break in this tournament.
It was not one of the games of their first-round match. But in the same way than the previous, there are possibilities that the Inmortal game was played using pieces similar to these.
Another possibility is that a similar set could have been used in 1858 in the match between Anderssen and Morphy.
Bought in 2015 to Official Staunton.
Boxwood and ebonized boxwood, weighted.
This set has a king of 110mm-48mm and a pawn of 50mm-32mm. It suits best in 55-60mm chessboards.
This is possibly the most accurate reproduction in market of the original set, with and extremely good carving quality.