Rayment's Patent c1887
Perken, Son & Rayment
Established 1852 as Lejeune & Perken and from 1887 as Perken, Son
Their Optimus trademark was registerd 1885.
This example is a half plate format camera. Brass lens marked Perken, Son & Rayment
Hatton Garden London, Rapid Euryscope 9x7 Optimus, and it is cut for water-house stops.