This picture shows a vial of insulin produced in 1923, two years after insulin was discovered. It shows a 5cc glass bottle. The insulin is from Lab. No. 257-4, dated November 5 1923. The label on the front of the bottle reads: 'Insulin 10 units - 5 c.c. vial. 10 units per c.c. Connaught Laboratories. University of Toronto'. According to the Connaught anti-toxin laboratories filling records for insulin this bottle was filled November 1, 1923.