Two Eclipse-branded lathes are known, both produced for sale (presumably) by either the Sheffield-based hand-tool makers James Neil & Sons (using their Eclipse brand name) or by Fry's (London) Ltd of 24-26 Water lane, Queen Victoria Street, E.C.4 who were known to have offered such a machine during the 1920s. The smaller of the two is a very rare version of what appears to be an early 21/8" x 10" plain-turning Portass (or a copy of it) and the other a 4-inch centre height machine of unknown origin - though marked as "British Made". Research indicated that the maker may not have been Portass, but Samuel Peace & Sons Ltd, of Well Meadow Steel Works, Sheffield a firm able to undertake crucible (high-quality steel) casting and who made various products including such diverse items as sets of files and complete machine tools.
Manufactured from 1926 onwards, for an unknown length of time), the smaller of the pair was made when Portass was trading as the Heeley Motor & Manufacturing Co., If the lathe was by Portass, the re-sellers  must have insisted upon certain refinements for the machine was altered in considerable detail from the standard version. The headstock, instead of being cast as-one with the bed, was a bolt-on unit and, in place of a spindle running direct in the cast iron of the headstock (with simple clamp-down splits for adjustment) proper two-bolt caps and bronze shells were used. Each bearing was topped with a boss to accept a dirt-excluding flip-top oiler - an unheard of luxury on any Portass product. A 33/8-inch diameter faceplate would have been supplied as standard, as was a simple, but well made compound slide-rest. Further details of these early Portass-built lathes can be found here.
The larger Eclipse, shown at the bottom of this page, was a non-backgeared but screwcutting lathe that used a leadscrew running down the centre line of the bed (complete with a dog clutch at the headstock end) in a manner identical to that employed by Drummond on their 1902 1942 3.5-inch flat-bed models. It also resembled the Keen lathe, believed to have been made in Australia.