"CYLINDRICAL SHAPE; OVER-ALL DIMENSIONS,14-1/2 IN. H,5-1/2 IN. W,8 IN. LG FRONT TO BACK,3-1/2 IN. OD PERISCOPE TUBE; 5 IN. PERISCOPE OFFSET; OPTICAL SYSTEM TYPE,SINGLE OPTICAL SYSTEM,1.5 X MAGNIFICATION; FIELD OF VIEW,48 DEG. HORIZONTAL,48 DEG VERTICALLY; W/ELEVATION MECHANISM,60 DEG ELEVATION OF LINE OF SIGHT,15 DEG DEPRESSION OF LINE OF SIGHT; SINGLE EYE PIECE; ACCOMMODATIONS FOR LIGHT INSTRUMENT INCL.,MODEL M50"