Well, this isn't going to be much better; but it's a start. My closest number before yours is 404219, shipped 09/09/22. Closest after is 594161, shipped 08/23/28.
Both of these are target models. It seems likely target models were shipped even more out of order, just because there were comparatively fewer of them. Jinks once told me he figured the target models accounted for around 2% of production.
It will be interesting to see how all this shakes out----assuming some more folks step up with worthwhile information.
Ralph Tremaine