Shown in the middle of this page (displaying a number of Portass models) is this completely unknown Model. Not only is the maker's designation a mystery, but the lathe itself is distinguished by numerous features all of which are at variance with normal Portass practice. Indeed, so novel is the design, that if it had not appeared on the all-models page the writer would seriously have doubted that it could be a Portass at all. The most unusual part of the lathe - and not just for this particular maker - is a changewheel arm carried on the end of a long shaft supported on a bracket extending from the end of the left-hand leadscrew hanger bearing. At its lower end this assembly is fitted with a dog clutch and, outboard of that, a single-slot arm to carry the gears. As well as the inconvenience of making the lathe much longer than necessary the writer can see absolutely no benefit in this arrangement - and is puzzled as to why it was used. For a Portass, the cross-slide ways are unusually wide and the compound slide rest handwheels spoked and of relatively large diameter. With the ability to take a 1.25-inch wide flat belt the headstock pulley is especially robust, the tailstock quite unlike anything fitted to another Portass  - as is the exceptionally long bed, with its slotted feet and the lack of gap - whist the backgears and output gear on the end of the main spindle are of a much finer pitch than normally used.
Another unknown model type is shown here
If you have a similar machine, please do make contact.