Sometimes badged as a "Bridgeport" the Adcock & Shipley 1ES millers replaced the 1E range which had been introduced in 1964. The 1ES was build employing basic design as the 1E with heavily ribbed castings of great weight and stiffness. Fitted with a No. 40 INT nose, the spindle was supported in three bearings, two of which were of the high-precision, pre-loaded angular-contact type and mounted close behind the spindle nose.
A 2 hp motor was fitted across the range and enclosed, with all the ancillary electrical equipment, inside the base.  In comparison with the 1E, the makers claimed a knee of improved stiffness with some 50% increase in the width of the knee bearing on the column together with a better locking system. Wider; an improvement of 30% in table area and a 30% increase in table travel.
The range was divided into the "M" machines, which featured purely hand-feed tables, the "G" and "J" models for repetitive production work with Mechanical Auto Feed and Auto-cycle Mechanisms and the "AH" type - the latter fitted with an Auto-cycle system driven by Air-Hydraulic power.
Intended for general-purpose work the "standard" machine was the Model 1ES-G that had 18 spindle speeds from 50 to 2500 rpm and 6 rates of longitudinal table feed from 0.004" to 0.50".
An interesting if expensive option, was the fitting of a complete J-Type ram-type head from a Bridgeport - Adcock & Shipley being owned, at that time, by the Bridgeport Corporation. The head (shown towards the bottom of the page, added considerably to the miller's versatility being able to move in and out and swivelled (though not, as on some Bridgeport models, nodded). The head had both power down-feed and hand-driven fine and rapid-action feeds and took, of course, the ubiquitous and inexpensive R8 tooling.
The data below beings with the Model 1E, illustrates the complete model range and specifications and progresses, down the page, to that for the 1ES..