This is unusual 3 1/2 fso. Most are 3 fso. Lens is in very good condition condition.
RARE Corning Red 4 1/2" X 3 1/2 F.S.O. 1935 Smooth Lantern Switch Lamp Lens
Vintage Glass Spredlite Corning Amber Lens - 5" D x 3 1/2 Perfect Cond 1935
ATCHISON TOPEKA & SANTA FE CORNING AMBER SHORT RAILROAD LANTERN GLOBE
Vintage 10” Corning Amber Lens, Chippenham, Railroad Train Signal, never used
Vintage Corning Amber 5 3/8 D. X 3 1/2 F.S.O. Oil Kerosene Lantern Lens LOOK!
Triang Hornby RS.35 RARE Boxed Set 4-6-2 PACIFIC FRIEGHT SET