Party Wagon Confusion

[TurtleWA]

Does anyone else have a party wagon with no date stamp on the underneath portion. I recently watched a YouTube video and seen the date stamps for the 1989 original and 2009 reissue. I currently have one with no mark at all.

The door does say 1989 because I took it off a 1989 party wagon with matching underneath date. The one I took the door from had the mark underneath but was missing other parts so I sold it and kept the door for the current one I have. If the video is correct my stickers also match the 1989 version but are in spectacular condition compared to the video example.

Could I have a reissue body from 2009 or 2013 with vintage stickers and door from 1989? Frankenstein version I suppose. So Confused by the no date on the bottom side. Thanks for assistance. Oh, does the 2013 release have dated bottom piece as the 89 and 09 does?

The video I watched is linked below.
https://m.youtube.com/watch?v=O9rPong-5HY