There are four major variations of NID Field Grades, and very likely other minor variations. As the gun was originally introduced, it just had the roll-stamped logo on the sides of the frame --
From the serial numbers, it appears the workers at the factory began adding the "stars" to the Field Grade in mid-1927, but they don't appear in the catalogues until the 1929 edition --
About 1935, Ithaca dropped the cocking indicators, the roll-stamped logo and the "stars" and introduced the New Ithaca Field Grade with border engraving and the nicely matted receiver top --
The few Field Grade doubles manufactured/assembled after WW-II, didn't even get the border engraving --
As for the gun in question, there should be the gauge and a letter F, for Field Grade, stamped near the front of the left watertable. Like this --
