Envoy camera  type_Projectors Nikon has a nice writeup

Nikon has a nice writeup on their historical site

styled like a classic Leica Elmar (but it’s not an Elmar

This lens will work with most newer DX-format Nikon DSLR cameras

Distance scale in metres

A few custom attachments are also included: a "stud" type attachment for the base (so it can be held in a clamp) and a short (approximately 2cm) extender for the top

Envoy camera &nbsptype_Projectors Nikon has a nice writeupThe Envoy is a simple box camera that shoots 6x9cm images on standard 120 rollfilm. Also, unexpectedly, while it only has the single shutter speed and literally no other features, it does have a two position focusing lens. Made of brown Bakelite, naturally, and in good condition, with minor cosmetic wear.