Are the 1430s the most likely date range for the Zodiac drawings?

[R. Sale]

Here's another(?) Hagenau example dated 1442-1444. There are three illustrations.

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UBH Cod. Pal. germ. 362 Flore und Blanscheflur

The question is whether the VMs has to come after the Lauber works, or could both VMs and Lauber come from an earlier proto-Lauber of from someone's real-life experience? What evidence can show how the timeline fits together?