While I applaud your perspicacity in seeking out these interesting pens, David, I can't but tweak you for being a bit late to the party:
Uh Oh... it's a pretty rare day when Nishimura rolls up his sleeves to go man-vs-man for a rough game of "whose collection is bigger..."
I'm honored... I think.
Of course, that I'm later to the hobby than are some collectors, makes "late to the party" rather inevitable. So it goes.
Thanks for the serious eye candy, no joke.
A couple of my boxed sets are still packed from the move, so not sure I can find everything, but perhaps tonight I'll toss my rebadged Parker-as-DM pens and de-rebadged Parker-as-DM-released-as-Parkers into a tray and see what I can come up with.
More, below...
I don't think all of these are all that late, despite the conservative design of the rebadged Duofolds. One bit of evidence is the pressure bars, which are almost always the later three-part version. And though I have to look more closely, most of the original instruction sheets I have for button-filling Diamond Medal Parkers are dated to 1937 and thereabouts.
What I can bring to the party-- and it is something perhaps not well addressed even in the book that featured some of your pens (or so I'm told), is to date the styles.. more or less.
What I have lying around (still in tattered moldy 500pg catalogues) are several period ads covering the DM Vac-FIl, the sac pens (which I suspect were called Sac-Fil in one ad, unless I just imagined that), and several of the Webster and Good Service pens. While appearance in one ad does not preclude later or earlier appearance, we can get handle on some of these
As you know, we've had couple threads-- lengthy threads-- that show the derivation of the DM pens from some of the Parker series.
DM Vac-Fil and more:
http://www.fountainp...om-the-thoitiesNon Vac-Fil DM's by Parker:
http://fountainpenbo...ker-exc-vac-filThough those wander a bit, what with trying to show the style linkage to Parkers, proper.
Might be good to show the few ads with lower resolution and to just list the pens and series from DM, without all the effort at linkage.
For example, the four plastic patterns seen for DM Vac Fil (Plaque-on-Black, Web, Lines, Pinstripes) each are shown in one ad, without overlap of styles, that appear from 1935-1938.
For the button fill pens I showed in my last post, the three pens on left, including my new find in Moderne Black/Pearl plastic, seem to be derived from Duofld, while the pen on right in green resembles both the DM Vac Fil and Deluxe Challenger. I'll bet the ads show one or the other type.
More later.
regards
david