brass mounted Rapid Symmetrical lens
circa 1900
Symmetrical Lens F.6 6.5" f.l.
circa 1910
Ross Rapid Symmetrical Lens
circa 1910
Symmetrical lens with Waterhouse stops
circa 1880
brass mounted symmetrical wide angle lens F.16 8.5inch f.l. ring diaphragm. Wray
circa 1910
Brass Mounted Wide Angle Symmetrical Lens
circa 1890
brass mounted wide angle symmetrical lens F.16 7 inch f.l
circa 1890
Symmetrical lens F.8 11" f.l.
circa 1890
Ross Brass Mounted Rapid Symmetrical Lens
circa 1900
symmetrical lens
circa 1880
Brass mounted symmetrical lens F.8 11 inch f.l with a ring iris diaphragm
1905-1915
Symmetrical Projection Lens 5.5" f.l.
Symmetrical Lens No.6
circa 1880
symmetrical lens
circa 1905
Ross Symmetrical Lens F.16 7" f.l.
circa 1890
No.1 symmetrical wide-angle lens F.11 3 inch f.l. with Wheel stops. Ross
circa 1900
Brass Mounted Symmetrical Lens
Brass Mounted Symmetrical Lens
circa 1890
Brass Mounted Symmetrical Lens
c. 1890
Ross Symmetrical Lens
Ross Rapid Symmetrical Lens
1875-1885
Symmetrical Lens F.8 8" f.l.
circa 1910
Beck Symmetrical Lens.
circa 1910
Brass Mounted Symmetrical Lens
circa 1880
Brass-Mounted Rectigraph Symmetrical Lens
circa 1885
Symmetrical lens
circa 1880
symmetrical lens
circa 1890
Symmetrical Lens.
circa 1860
Brass Mounted Symmetrical Lens
circa 1870
brass mounted symmetrical lens
circa 1895
Symmetrical Lens.
circa 1870
A Symmetrical Lens.
circa 1900
Ross rapid symmetrical lens
Ross rapid symmetrical lens F:17 inch
Beck Symmetrical Lens
Ross No 6 symmetrical lens
Beck Symmetrical Lens
1900-1910