It looks to be 2000 and that’s what I would report. Usually the ANSI date is within 2-3 years of the manufacture date, but it’s not unheard of to be up to nine years later, which is the widest spread that I’ve found.
There are at least two reasons that I’m familiar with why the manufacture date and the ANSI date have a wide spread:
- The unit was actually manufactured by a smaller subcontractor working under an older ANSI set. This often happens when the big boy has a plant shut down due to maintenance, disaster, or labor conflict.
- The unit was manufactured under an older ANSI set because the new set would have required a complete redesign of the model, something they were not prepared to do at that time.
Use the ANSI date if you don’t have the date of manufacture, but you do here, which is 2000. If I don’t have the manufacture date, I state the date of manufacture as “ca. ANSI date.”