Built in the usual, no-compromise Schaublin fashion, the backgeared and screwcutting SV-130 and SV150 models were in production from the early 1930s - though by 1938 the SV-150 had disappeared from the catalogues as had, by 1946, the SV-130.
With a centre height of 130 mm (SV-130) and 150 mm (SV-150) and admitting 750 mm between centres, the lathes were, in effect, identical. However, although the SV-150 remained unchanged though its relatively short production run, the SV-130 was built in three versions. The first,  the Mk. 1 (like the SV-150), had its flat-belt-driven, speed-change gearbox mounted low down on the outside face of the headstock end cast-iron leg (or, as an option, an electric motor as well in the same place). The next, the Mk. 2, was carried on two substantial cast-iron plinths with that at the headstock end having the electric motor flange mounted against the outside face with the drive passing across to a speed-change gearbox fitted against the inside face. The tailstock end support was arranged for storage, with a hinged cast-iron door. The final model, the Mk. 3 (probably introduced during 1939), looked almost identical to its forerunner except for a redesigned headstock - the previous rather ungainly-looking, humped-backed type being replaced by one with a long, almost torpedo-like appearance.
Deep, and without a gap, the bed had its front V-way with an outer surface made wider and set at a shallower angle than that on the inside; the aim being to provide a steep inner angle to absorb tool trust while the outer section spread the load and so slowed the rare of wear. The saddle had long wings, with those to the left able to over run the front of the headstock in order to bring the centrally positioned cross slide right up to the spindle nose.
Usefully wide in range, the six Spindle speeds on the Mk. 3  (and probably the other versions as well) were 65, 100, 165, and 200 r.p.m. in backgear and 430, 650, 1000 and 1650 in open drive.
Screwcutting was by a complex, semi-sealed gearbox where (on the Mk. 2 onwards) the previously open slot across the front with its row of exposed indentation holes was covered by a steel plate held in guides top and bottom and arranged to move sideways with the tumbler selector. The quadrant lever to the left was also similarly fitted, a plate sealing the open hole where a stud connected to an internal selector. On all types a leadscrew provided a means of generating threads with a separate power shaft to provide the sliding and surfacing feeds -the latter selected by a 3-position quadrant lever on the face of the apron. A "third-rod" control system was fitted which, like that on the screwcutting version of the 102, allowed the carriage drive to be reversed - a lever, pivoting on the right-hand face of the apron, roving the control.
Rather unusually, a centralised lubrication system was fitted with a reservoir (positioned very inconveniently behind the headstock) with a network of pipes taking oil to the headstock and screwcutting gearbox.
If you have a Schaublin SV-130 the writer would be interested to hear from you.