EXCEPTIONAL LENZKIRCH VIENNA REGULATOR WALL CLOCK. Lenzkirch clocks are generally considered to be the finest of the German factories who consistently produced timepieces of outstanding quality during the last half of the 19th century. This clock is illustrated in their 1855 catalogue as Model 93. Another example is also illustrated and described in - ''Lenzkirch clocks , The unsigned story '' by George A Everett . Many of the their early clocks were unsigned.