David,
#1 is a late Admiral; these seem to be all LF w/ a Feather Touch 5 nib. Early Admirals came in both vac-fil and LF, but had a shorter "59" Triumph nib. I've got one 59 that is two-tone and one that is monotone (w/ no line incised across the nib to separate the platinum mask and no sign, even on the underside, that is was ever plated), whatever that means. Definitely thinner gold than a "79" nib, both have a bit of flex.
#2 is a Sovereign II. These also came in vac-fil; for some reason, I only have one in black.
#3 is a Cadet, the pen formerly known as Jr.; should have a 23 nib.
<One feature that catches my eye is that the bead-band pens have plastic threads, unlike the higher-line pens.>
Vac-fil bead bands have the metal thread ring, same as the rest of the Sheaffer vac-fil line. Black vac-fil Sovereigns and black Tuckaways have a gold thread ring; the remainder of the vac-fil bead band line has a chrome thread ring, by the way.
But wait, there's more! In late '46-early '47 (Kirchheimer), after which most of the bead band series was discontinued (Kirchheimer), there's a lever-filler Craftsman-33 nib with metal thread ring on the barrel and the section screws into the barrel (triple lead threads, so you can line the nib up w/ the lever). The top half of the section is striped celluloid, the bottom half is a clear plastic. The cap is the same as used on the vac-fil with a metal liner and embossed threads. I don't have a picture, so here is a link to one that sold recently:
http://cgi.ebay.com/...em=320554493535There are others with the striped/clear section lurking out there. Two lever-fill Statesman pens with Triumph nibs, striped/clear sections, and metal thread rings sold recently on ebay.
Daniel gave me the model names in the bead band series, which are summarized as best as I can figure, without model numbers or filler type, below (how the heck can I do this in columns?):
Sovereign II, 5", white dot, Triumph 79 nib, 875 price code, self adjusting clip
Lady Sheaffer II Tuckaway, 4 1/2", ditto
Admiral II, 5", Triumph 59 nib, 500 price code, self-adjusting clip
Milady II (Tuckaway?), 4 1/2"?, ditto
later Admiral, Feather Touch 5 nib
Craftsman II, 5", 33 nib, 350 price code, solid clip
Diana II, 4 1/2"?, ditto
Cadet II, 5", 23 nib, 275 price code, solid clip, chrome trim
Minerva II, 4 1/2"?, ditto
All pencils, including non-grey chrome trim, i.e., Cadet, seem to have self adjusting clips. Gold trim pencils have a 300 price code; chrome trim pencils have a 250 price code. Tuckaway pencils are price coded 350? Don't know about the (shorter?) pencils that would match the Diana and Minerva.
corrections are welcome!!