Flawless description
Dating EMC E-series frames is getting more and more difficult
New information is coming out (most of it unconfirmed) that neatly blows away the dating I thought most likely.
This is a topic for a new update thread.
E 2022 is definitely 1981.
Earliest month is March, most likely April/May, latest is July.
Without new verified data I can't be more accurate