Maytag wringer washer date of manufacture

[superkonr]

I thought I had a serial number list to narrow down the date of manufacture of the early Maytag washing machines to the month, but I can't find it now.
I have a model 90 #427338A and a #864390. Anyone have a list?
Thanks

 

[maranoman]

Hopefully this helps.

Doesn't show serial by month, but month/year ranges.

 

[bradross]

According to the chart in the Maytag Collector's Club Volume #2 ...

Model 90/91/92...serial numbers 422250 - 445459 production dates: Aug. 1 - 31, 1929.

Regarding the second serial number 864390 - ?