Anyone got an opinion on this lever? I haven't been able to find Stephen's book in the US but I had never seen this lever on an Onoto before and wonder why or how -or mainly if - DeLaRue were using it (or anything so complex, possibly to get around the Watermans box patent?) so early in their l/f production?
In her un-illustrated book THE HISTORY OF THE ONOTO PEN, Eileen Twydle says that DeLaRue (for which company she sounds authoritative, using the term "we") started making l/fs in 1922 in response to market pressures: but their earliest lever seems to have been a straight Sheaffer-type one (known in UK as the Swan/Valentine style) and not the lever in a box Watermans style they adopted later. But this ebay-appearance is neither??
I wonder if they patented this curious design or did this lever just come out of someone's parts stock in the mid 1920s? But I have also never seen a generic version of the 1920s Pilot lever without a P or an N in it? I suppose, in its symmetry, it looks a bit like the early 1920s lever which MontBlanc used for about ten minutes, - shown in the 'Fountain Pens - Their History and Art' book [http://www.ebay.com/...984.m1555.l2649].