Where to find production date of ColorChecker SG and ColorChecker Classic Chart

The production date of a ColorChecker SG and a ColorChecker Classic chart (A4 or LTR) is printed on the back side. Newer charts have a ‘Month Year Edition’ print bottom right on the back. Charts, which do not have printed a production date on the back, are likely older than it is recommended for use (the reference data ‘before November 2014’ should be used or the chart should be replaced by a new one).