Peter:
Thank you for that information. It was very helpful and I never would have found the serial number without knowing where to look. As it was, I had to find it using the Braille method. Then I had to shut off the overhead lights in my garage and use my bike light at an extreme side angle to get the engraving to pop. It truly is hand engraved! It looks like my serial number is CCM Y0606 E 000 which means, if I understand correctly, it is the 606th boat of model Y manufactured in the USA in May of 2000. Is that correct?
Looking at some of the other links you provided, it seems as if this is an early version of the Mirage Tandem as mine does not have the round hatches on the floor immediately in front of each seat. It just has a large round hatch in the front bulkhead and a smaller round hatch in the rear. Here's a link to the photo I took of the serial number. See if you read the numbers the same as me.
https://minneapolis.craigslist.org/hnp/boa/d/minneapolis-hobie-tandem-kayak/7485424522.htmlSteve