You are right Jim, it's a Newmar Dutch Star model number 3894. Thank you.
The Michelins are shot regardless of the age. There are cracks on all of them. I ordered the new tires and they came today. Will have them installed this weekend or next. Local tire guy I've been going to for years will do it for $240, including the balancing. Got another quote from a bigger shop nearby and they want $300.
Unfortunately, I ordered the new tires without much thought to the date code. The last 4 DOT numbers are P627. I'm assuming 2017 but am not sure. Regardless, I bought them on Amazon so, if I'm unhappy, there may be recourse.
Any thoughts?