The results are in! The Jeffs are on the Jefferson Project page (which I was horrified to see I hadn't updated since 2012!).
For the Ikes, a 1973S silver clad slabbed by PCGS and graded MS67.
For the birthyear set, an East German 1 pfennig and two West German 1 mark pieces, mintmarked G and J -- since I already had D and F, that closes out West German marks. The Czechosloviakian 25 Haleru closes out Czechoslovakia. There's also 5 and 10 centavo pieces from the Dominican Republic, and a very upgraded East African 50¢.
And in the category of "Ooo, pretty!" there's a 1961 Katanga 1 Franc, a 1964 Jersey 1/4 shilling, and a 1679 Chuck Jr. farthing. Well, I'm pretty sure the last digit's a 9. It doesn't look like anything else.