Oscar Ehrlich was a well known, long-established and prolific manufacturer of lathes with premises in Chemnitz, Germany. Although the Company exported widely, it appears to have been common for them to leave off any identifying marks from their machines and instead market them though distributors, one such being Tyzack in Great Britain who sold them using both their own and the IXL brand names Other British distributors also handled the make, with larger tool dealers branding them with such names as "Olympia" - obviously to disguise their German origins. Another branding that has been found is AEG - for machines sold in Mexico.
Fortunately Ehrlich were a conservative company and the design of their lathes, and many small details of construction -  for example, the distinctive top slide - are easily recognisable on machines constructed from the late 1800s until the 1940s.
Of utterly conventional, contemporary design, most of the lathes shown below were built during the 1920s and 1930s and made in two centre heights of 130 and 155 mm - and with 6 between-centres' capacities offered of 500, 750, 1000, 1250, 1500 and 2000 mm.  Available with or without a feed shaft to provide power sliding and surfacing speeds independent of the leadscrew, the lathes could also be supplied fitted to either plain cast-iron legs or a more substantial plinth with storage for a large set of screwcutting changewheels. Early models, designed in the first decade of the 20th century, were also offered on treadle stands for locations where there was no electricity supply or convenient stationary engine to drive them.
Ehrlich lathes were often badged as though made by Berlin-based Schuchardt & Schütte, one of the largest German-based tool and machinery dealers of the time and, consequently, a company with sufficient buying power to dictate terms to manufacturers. During the 1930s Ehrlich became "Union-Werk" (still based at  Mittweida, near Chemnitz)- under which brand the company prospered further with the name used in post-war years by the communist East German Government to market a wide range of machine tools (see picture at the bottom of the page). By the late 1920s, the top-of-the-range models were not only very well constructed but also enjoyed a comprehensive specification with a typical example having a full screwcutting and feeds gearbox with tumble-reverse drive, a separate power-feed shaft to run the sliding and surfacing feeds, a large T-slotted saddle that doubled as a boring table and a wide V and flat-way bed - the front V being set with a wide, shallow angle to better absorb wear and a short, steeper inside face to take thrust.
In December of 2018 an interesting lathe, almost certainly by Ehrlich, turned up in Norway, having been left behind in a German army mobile workshop truck at the end of WW2.
If any reader can provide further details of Ehrlich lathes branded in other ways, or of their other machine tools and photographs, the writer would be delighted to hear from you..