Pretty Uncommon – British Enfield Bore Viewing Device (Type Two/Pattern Two) Adopter around 1915 to replace the earlier style. Brass exterior with folding handle and small mirror for bore inspections, similar to a modern day bore light. These Examples are stamped “Gilbert” which was a commercial company contracted to manufacture these along with around a dozen or so other entities. These 3 examples bear no other stamping, likely unissued. Price is Per Bore viewer, they are all in excellent shape with some light handling marks and some light wear around the mirrors.