But, I stumbled across couple 1946-ish adverts on ebay and grabbed images.
Collectors tend to call the conical nib introduced with the new 1942+ pens, the "Triumph nib". As has been noted before, the pen, Triumph, seemingly did NOT get its name from the new "Triumph nib"; rather the new conical nib takes its collector name from the Triumph pen (the new 1942) pen, which featured that nib. Off hand I do not know if Sheaffer eventually started calling the nib a "Triumph" nib, but might have.
Another challenge for collectors is the apparant lack of an overarching series name for generally similar pens of the War years, the post War years or both. Parker had its Vacumatic and before that Duofold, involving many models and variants, but all part of given series. Sheaffer had Balance during the 1930's, with wide range of models and variants, but all still Balance.
Sheaffer's 1940's are more problematic. The War years saw few models, Triumph, Crest, Crest Masterpiece, etc, but these structurally similar pens seem not to be part of a given series. Post-War 1940's pens are more challenging still, as the model range blossomed, to include again pens with typical open nib, featuring frantic evolution.
So, these ads caught my eye.
The first shown just below dates to 1946 or so. Some nice findings. The ad shows the Sheaffer Sentinel (and matching Tucky), pens with brushed chrome cap on plastic barrel. The ad emphasizes that these are Triumph, showing a couple models within the Triumph group. Should we consider then the 1945+ pens with conical nib to be the Triumph Family? I dunno.
Too the ad mentions sets at $3.95 and up. I know of no Triumph-nib set that inexpensive and assume it references the least expensive of the (open nib) bead-band pens. Unfortunately, the ad does not quite specify if these pens are excluded from the Triumph cluster. Could it be that the 1946 "Triumph" pens need not have a "Triumph" nib?
Also interesting is the "post-war models at pre-war levels"; the $12.50 for Sentinel matching the price of the thinner all-plastic original 1942-5 Triumph pen.
Finally, the pen shown reflects the price noted for the smaller steel-cap Sentinel rather than what I of late have come to believe is the slightly later Triumph Deluxe at $15. Sentinel actually was a smaller pen than the all-plastic post-War Valiant. It was only with the temporally serial size bump to Sentinel Deluxe that the metal-cap pen became a size-match to Valiant.
So much in one wee ad...
The next add, also I'm guessing late 1945 or so, shows a member of the "Triumph" cluster, this one of course a Valiant "Triumph" (there being, i note, no non-Triumph Valiant at this point, so... why emphasize "Triumph", if not to link Valiant to a series). Too, the conical nib is shown, perhaps four years after its introduction, and still is not called by Sheaffer a "Triumph Nib".
The ad emphasizes "Triumph pens and Fineline pencils", yet mentions, again, "other sets $3.95 and up", without mentioning they are Sheaffer "non-Triumph" pens at that price. This ambiguity does not give hard direction, but leaves open that Sheaffer considered all its pens to be Triumph at this point, some of which have the Lifetime point, others perhaps not. The other interpretation (favoring a common view now that anything Triumph must have the conical nib) being that the advert is for a Triumph pen and that Sheaffer's other pens (not necessarily "Triumph") start at the cheaper price.
The ad...
Food fer thought.
regards
David