Hi polram,
The only reference I could find on the web to a Sealy Crown jewel was a crib mattress.
Even if the layering was available though there are really only 3 ways to “match” another mattress with a mattress made by another brand (and I would never consider buying a major brand mattress anyway) and none of them would be possible or practical with a Sealy because they don’t disclose enough meaningful information about the quality and type of the materials in their mattresses to match them to another mattress except with side by side testing in “real time” (where your body will tell you which mattresses have a similar feel and performance).
They even make it difficult to match one of their own mattresses to an identical mattress sold at a different stores because the same mattress goes by many different names (sometimes several dozen) so that comparison shopping is difficult and each store can “claim” that they carry a unique mattress and not have to worry about comparison shopping. Some retailers will have a list of the different names and which ones match each other but again this is only effective if you are considering a major brand in the first place which I would avoid anyway. There is more about trying to “match” another mattress in post #2 here).
It’s much more effective to have a list of more objective standards (such as the list of “needs and preferences” in post #2 here) that is used to evaluate each mattress you test and “rate” each one with a common set of standards that you can test for more objectively. Testing mattresses using only more vague or subjective reference points such as “comfort” can lead to some poor mattresses choices (and this is exactly what many salespeople who don’t know any better will tell you to do). You could for example make a list of the of the qualities about the Sealy that you like and then test and “rate” other mattresses that use better quality materials (and will be more durable and have better value) on the same set of common “standards”.
There is a set of steps (including some links to some helpful information) in post #1 here that can greatly improve your odds of finding a good quality/value value mattress that matches all your needs and preferences and will help you connect with the better manufacturers and retailers in your area that can help you make much better choices.
Some basic research, eliminating the worst choices, and then connecting and working with the better manufacturers and/or retailers that are more knowledgeable and sell better quality and value mattresses will lead to much better quality/value choices that will met your needs and preferences in both the sort and long term.
If you let me know the city or zip where you live I’d be happy to point you to any of the better options in your area that I’m aware of.
Phoenix