A watchmaker's lathe's with its major castings - and its collets - made entirely in bronze. Lacking any maker's markings, the lathe has the appearance of something that might have been made in the late years of the 19th century, but could be even earlier.
This is not the only watchmaker's lathe to be so constructed, most of the early Swiss Universal and English Mandrel types were so built, as was the not uncommon (if much simpler) British-built CLH, sold during the 1940s and 1950s, and the very rare Bolein.