i am still a little confused.
The third pictured pen, which except for the sphere point matches the OP pen, both in blue, is a 701.
The reference does not indicate a model number for the sphere point, but says it is a first generation pen.
Does that suggest that the reference is wrong about cap styles and that the third pen is proof that there were first generation pens with that cap style? And was the sphere point associated with any specific model number as an identifier, or was it simply a nib option simialer to other nib options.
Perhaps there is another explanation. Maybe there really was no "first generation" with a single cap design, rather that Eversharp did the same thing which Parker did with the 51, have a pen with set design elements, some which didn't change except when there was a model redesign such as clip design and placement, some elements which were different by buyers choice, such as nib types and widths and some which likely had different names or numbers reflecting cap differences.
That does not mean there was not a specific cap design which was initially produced, there likely was, and it may have been the predominant initial production. Things such as caps with certain features can take time to produce and might be missing from initial advertisements. Thus, the third pen might reflect a little produced, late first generation cap design that simply wasn't ready when the other one was and when the second generation, per the year of production and placemet of the clip as well as other aspects of the cap are taken as cues for its generation of production and the decision was made to continue into the second generation an element (and likely then available and unused material) for the new design.
I sometimes think of automobiles and their style and option changes in regard to pens and how sometimes a car will come out and some options will not be available initially, but are available later in production and that those options may be then carried on to the next model year and appear on the next years cars in much larger numbers, so much that one can mistakenly associate an option, a feature, and sometimes even an edition name to a specific year when in reality it was used earlier and sometimes later due to the a ailabilit of certain options and option packages. In cars this can be very confusing, especially if there are certain options you are trying to get, they are no longer available and it is unclear except through digging through a combination of press releases, reviews and origonal dealer material to determine which tears and which editions for which years had the options you want. I personally dealt with this last year in trying to get a used van with adult "Captain style" second row seating, with all leather seating, heated driver and passenger seats, rear back up camera, fog lights, satellite radio and a CD player, features we could not get in a new van. With pens fewer options mean that any given combination may suggest a specific model year, but may not define it.
Edited by Parker51, 28 August 2020 - 17:02.