Water heater age

Need some help with the age.

Sentinel
Model CRER 42 D
S/N 8309 397276

Sentinel is manufactured by American–the 1st 2 digits are the year, 1983.

http://www.nachi.org/water-heater-dating-chart.htm](http://www.nachi.org/water-heater-dating-chart.htm)

Thanks Jae!