Signedon front of lens: C. P. GOERZ AM. OPT. CO. APOCHROMAT (red circle) ARTAR 19 IN. F: 11 No 789944
Inscribedon side of lens: F: / 11 / 16 / 22 / 32 / 45 / 64 /90
on back of lens: 789944
FunctionThis lens was used in dark rooms to enlarge photos.
ProvenanceLionel Spiro, Brookline, MA; Gift to CHSI, 2014.