All the dates you specified is exactly what I kind of guesstimated using Murray's third edition , and you guys here . However I did not know the approximate year the 800, 000 serial numbered rifle would date .
The only lever boss code I have written down is the 800,000 serial EG in 300 Savage. The lever boss code is 3E . I can get the other lever boss codes for the rifles in the above post by Monday or Tuesday of next week for your records .
You didn't need any of the other post-World war II lever boss codes ?