Ensign Folding Reflex
The Ensign Folding Reflex is a large-format SLR camera for plates (at least 9x12cm and quarter-plate, as offered in the advertisement shown here). It was made by Houghton in London. It offers great compactness compared to their box-form Ensign Reflex range. The strut-folding construction means that helical focusing lenses must be used, instead of the racking front of those non-folding models. It has a focal-plane cloth shutter, presumably the same as that in the box-form cameras, with speeds down to 1/1000 second.