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

[Mark Knowles]

Are there just the two workshops from Alsace that could be relevant?
The reference to "all those other workshops" illustrates the point quite well.

Assuming that the dataset that Koen and others have come up is representative then it should be clear as to which workshops are most relevant. Significant evidence of other Alsacian workshops producing such illustrations does not seem to be present in the data.