Based in the GDR - the Communist-controlled former East Germany - Andr?& Zwingenberger was best known in the West for their late-model Boley-like 8 mm "Geneva" type lathes. Sold under their own brand name, the lathes were also distributed labelled as the "Georg Jacob" and, in various other forms, as the WMW "Prazima" with model types that including the Z1, Z2, Z3, Z4 and Z5. Finally, further modified as to their drive systems and other details, by the 1970s they were being listed as by Saupe & Sohn of Georgstrabe 45, D-09207 Limbach-Oberfohna.
Manufactured from the early 1950s, the lathes were of heavier-than-normal construction for a "Geneva" type, with a 25 mm diameter bed - as distinct from the 19 or 20 mm used by G.Boley - and usually offered as a complete, boxed kit with motor and rubber-foot mounting plate at a bargain price - the aim being to acquire Western currency at almost any cost. Unlike most other watchmaker's lathes, a covering of paint (beautifully applied) was used on the headstock and tailstock - again mimicking the last of the Boley lathes made during the 1950s.
Marketed world-wide, distribution was often through the East German dealers Georg Jacob and so, perhaps, unsurprisingly, the makers were tempted to stamp the end of the bed G. Boley - though as this was done with a lack of finesse, using heavy punching and thicker letters placed too close together, the betrayal was all too obvious.
Probably only offered complete in a fitted box, the basic and necessary accessories included: a screw-feed compound slide rest, self-centring 3-jaw chuck, faceplate with clamps, a set of wire, cone and fir-tree collets, box chuck, two tailstocks one to take runners (a set was supplied) and the other with a lever-action spindle, lapping attachment, wax chucks, flip-up hand T-rest, safety pulley for turning between centres and various arbors.
Other extras were also available including an ordinary ring-scroll 3-jaw chuck, a lever-feed compound slide rest and a kit of parts to convert the lathe into a precision drilling machine - this consisting of a stand into which the tailstock end of the bed was fitted, a round drilling table to fit into the tailstock, jockey pulleys to fit on the back of the headstock and a bench-mounted 2-wheel jockey system to guide the drive belt from motor to spindle (all very much in the manner as also found with the English Coronet Ruby).
Some recent observations by the owner of a used example include:
?.the solid white oak varnished case has finger (box) joints and panel construction for the top and bottom with very interesting pivoting latches that are flush with the front side when closed - so allowing a very safe, positive locking.
With a centre height of 45 mm and 130 mm between centres, the lathe is a little short of 260 mm long . The bed is 25 mm diameter (it actually measures 24.99 mm) and is mounted on a nickel-plated foot with two 8 mm hex cap screws to secure the headstock and a 12.6 mm bolt and wing nut to clamp it to a bench. The bed is made from a solid bar of polished steel with a flat on top and grooved along the full length of the center line. It is stamped "G. Boley Germany" at one end while the other has a centre hole - with another hole lower down for an unknown use. The same name stamp can also be found on the base of the hand- rest base and underneath the saw table.
With an immaculate green paint finish the lathe uses a cast-iron headstock with an 8 mm bore spindle to take 8 mm collets secured with a steel draw tube having an aluminum handle. On the outer flange of the 3-step drive pulley is a circle of 60 division holes (with four larger holes evenly spaced every 15?to index a square) and indexed with the usual type of spring-arm with an detent pin on the end. The spindle bearings are plain bronze with ring-type adjusting nuts.
Two different cast-iron tailstocks, with black aluminum tightening nuts, are included with the lathe. The ordinary fixed version has the usual double-ended spindle, with male and female centers, whilst the drilling tailstock operates smoothly, has its own draw-in collet closer, an absolute maximum travel of 40 mm and a V-groove on the underside to prevent rotation. The adjustable (blackened steel) ring with screw lock located on the left side - though how this could be effective is difficult to see - a better position would be on the right hand side, between the tailstock body and the handle to limit travel.
With traditional dovetail construction and gib-strip adjustment - just 2 screws for the top slide but 6 for the cross slide - the compound slide rest is well made and has a smooth, even silky, feel. The 0.8 mm pitch feed-screws run through bronze nuts and are equipped with 0-40 divisions (= 0.02 mm per division) and neat, zeroing micrometer dials with friction locking. Useful travel of the top slide is estimated at 50 mm and 35 mm for the cross slide.
Included in the accessory kit are a number of useful items - through the tip-over T-rest does not match its base with any great accuracy and the two parts may well be of different origin as the filing roller-rest and saw table (20 by 40 mm) do not fit the hole - being larger by some 0.275" on the diameter of their support bars. Of 59 mm diameter the plain faceplate has one axial slot and adjustable angle plate, 44 mm long by 10 mm by 10 mm. The 85 mm diameter three-jaw faceplate is supplied with its own draw bar with a spring-center finder. the universal 68 mm diameter self-centering 3-jaw chuck can grip pieces internally and externally. The pivoting attachment appears to be of good quality as does a tailstock broche - the same as Nr. 15896 and 15 899 Georg Jacob model respectively. A number of collets, ring chucks, wax chucks and arbors complete the set.
If any reader can offer further insights into Andr?& Zwingenberger and their products the writer would be pleased to hear from you..