What year was the Maytag MER5530 Electric Range introduced in the market?

The manufacture date is determined by the SERIAL NUMBER. The following link explains:

http://www.fixya.com/support/r3576445-determining_the_age_of_your_maytag_appli

Look at the last two LETTERS of the serial number. The first letter represents the YEAR the appliance was manufactured. The second letter represents the MONTH.

If you have any questions, please let me know. I hope this helps you.