Not many interior pics to go by, but I agree that it's not typical for an SMB build. I guess someone could have special ordered a wood paneled interior? Why you'd want to take a modern vehicle and go with a retro interior, I don't understand.
SMB-less as of 02/04/2012. Our savings account is richer, but our adventures are poorer.
Looks like part of it is OEM SMB: the windows, side wall paneling, and dinette/seats look like typical SMB woodgrain (similar to what is in my van). My guess is the owner then added the pine tongue/grove board cabinets and whatnot after SMB did a basic build.