I thought we should do a "Modern" list of Tac Plates and USN/ERN as Stephen tauberts book's information stops at around 1977 for the Army instructions that it contains. It would be good do have a few more modern ones to cover the series 3 and 110's. But I can see why we don't have any as well.
So, a few unknown ERN's
2117
5207
5302
5307
5377
5450
5997
6480
6490
6507
6521
7706
7723
8366
8368
8910
8913
9128
9502
And I noticed on one of the auction vehicles a 2 over 22 as well, if anybody knows what unit that is for.