737 Interior question
 

I've been on a few planes now that say they are 4-7 years old on planespotter based on the registration number but the interior of those 737's seems to be very old. The one that's mostly metallic and the buttons are very large similar to https://c1.staticflickr.com/6/5505/1...2ab9c042_b.jpg

When did they phase out that interior and is the age reported accurately?