Snellen Vision Testing Cards Set for Railway, Marine and School Exams, Early 20th C. h sloan carrvinh 6 1/2" l x 3"

6 1/2" l x 3" widest diameter

4 13/16" w x 2 9/16" d x 1" t and in excellent condition

with a great sense of immediacy

Earlyish 20th century I'd guess and it looks hand-painted to me

but is forever kept from pulling out by a carved wooden arm that extends across just below the neck of the bottle

Snellen Vision Testing Cards Set for Railway, Marine and School Exams, Early 20th C. h sloan carrvinh 6 1/2" l x 3"Found in their original envelop, with Millar and Wel_ (?) Opticians on, Boston stickeron the face and instruction card still inside, this appears to be a complete, or nearly so, set of early 20th c. Snellen vision testing cards. Nineteen cards total, plus instruction card, with three of the cards showing railway signals to be read at a distance of 20 feet as these were commonly used for testing the vision of train conductors railway workers. Included: