Picture credit: AirTeamImages/Colin K. Work
This is a Deperdussin Monoplane much like the one used by "well-known" French pilot Prevost, who won the Jacques Schneider Maritime Cup in 1913.
The event was a speed contest open to all types of seaplanes. Flight compiled a History of the Schneider Trophy back in 1925.
The race was held eleven times between 1913 and 1931.