Karl
after a bit if digging I would agree. It is the Westland Walrus.
My source has it down as a Airco DH9A, but looking at it further The photograph matches the configuration of the Westland Walrus.
In 1920 the Westland design staff was to produce a carrier borne reconnaissance biplane for the Royal Navy.
The machine required had to be, basically, a DH9A. but with a 450 hp Napier Lion in place of the Liberty.
Westland built 36 aircraft of the type demanded. The aircraft was given the name Walrus.
You have control.