No apparent maker mark to the lens. Lens focus extends max 10.1mm.
ROJA Busch Anstigmat Series III No3 7.5” f7.7 Antique Brass Lens
Antique Brass R D Gray Periscope Large Format Lens w/Waterhouse Stops Test Pics
Antique Brass PETZVAL Camera Lens c1900 with Rack & Pinion Mechanism 4" / 10cm
Antique brass camera or projector lens with 32mm diameter thread
Antique Brass PETZVAL Camera Lens c1900 with Rack & Pinion Mechanism 3.5" / 9cm
Antique Brass Magic Lantern Lens Rack Pinion Metal Hood Photography Camera Old
