Finally got some hard information on our new 2017 Seneca that we ordered Dec 5. Comes off the assembly line April 7 and heads to the paint shop. Should be able to pick it up in Tampa last week in April.
I also got the VIN today as well. I figured the best place to look for the most current VIN decode info was NHTSA and found this info, last updated 05/09/16 so it is very current.
I plan to print it out, put it in a document protector, and stash it in the Seneca somewhere.
FYI...
https://vpic.nhtsa.dot.gov/mid/home/displayfile/32488