No separation, smooth diaphram/aperture. Photos of actual item for sale.
Vintage Soviet Pre-War Barrel aviation aero Large Format lens F-3 , 400 mm 4.5
Large Format Brass Lens 12x10 Rectilinear H Dallmeyer London (Damaged) VM 5043
Rare Vintage Dallmeyer Pentac 8” f/2.9 Lens – Fast Large Format & Portraits
Large brass Petzval lens, unknown maker. Not Darlot, Dallmeyer, Ross
J H Dallmeyer 10x8 Rapid Rectilinear Large Format Brass Lens Rack & Pinion
Dallmeyer SERRAC 8inch 200mm F/4.5 Large Format Lens
