Age of State Electric Water Heater

I need help with the age of a STATE electric heater - Serial # F76999904.

Thanks, for your help.

June 1976

1 Letter month followed by 2 digit year

Copy this PDF
http://www.inspectorsjournal.com/uploads/admin/WaterHeaterSerialNumberDecoder.pdf

June 1976 is my guess.

yep
letter

yep
letter month then year

Thanks!! For the quick response.