I too find the 1935 to WW-II version of the Field Grade NID the most pleasing.
It is basically just the Field Grade of that period, but in many of the Ithaca catalogues they showed the fully optioned (ejectors, single trigger, ivory sights and beavertail) Skeet Gun in the Field Grade. The page is boldly titled The New Ithaca Skeet Model Field Grade and above that they picture the fully optioned Skeet Gun. Below the Skeet Gun text they show the Field Grade gun with a slim forearm and state "This is the new model Field Grade Ithaca, a game gun without the extra features usually wanted by skeet shooters." By the 1938 "Dealers Quotations" They price the Skeet Guns separately from the regular doubles and state they have "Beavertail Forend, Selective Single Trigger, Automatinc Ejectors, and Ivory Sights." A regular Field Grade was $43 and a Field Grade Skeet Gun was $89.55, exactly the price of adding the ejectors $12.95, the beavertail $10.90, the SST $21.60 and the ivory sights $1.10.