The Feeler FTS-27 in its "Second-operation", "Capstan" and "Plain-turning Precision" forms was a copy of the Hardinge DSM-59. The following is very useful: HARDINGE DSM-59, DSM-59R and DV-59 (also advertised as the "DSM five-nine" and also applying to the HSL-59 short-bed version) - all these lathes were identical save for the equipment bolted to the bed. e.g.

HARDINGE DSM59 and DV59 High-speed Precision plain-turning lathes (The first
Hardinge lathes with a Dovetail bed). A superb, dedicated, detailed and well-illustrated Sales, Technical Specification and Accessories Catalogue. 28 pages.