EIA 1956 resolution chart

The EIA 1956 Resolution Chart (until 1975 called RETMA Resolution Chart 1956) is a test card originally designed in 1956 to be used with black and white analogue TV systems, based on the previous (and very similar) RMA 1946 Resolution Chart. It consisted of a printed chart filmed by a TV camera or monoscope to be displayed on a TV screen, and was also available as individual rolls of test film to test broadcasting equipment.

Source: Wikipedia — EIA 1956 resolution chart (CC BY-SA 4.0)