Interestingly, on page 273 of . . .
By: Dr No : March 20th, 2009-09:00
. . . "Wristwatches" by Kahlert, Mühe, and Brunner, there are good photos of a UG 218-9 movement above a Buren cal 1000 A, which is described as 'parallel to the Universal cal 215: 33 jewel anchor movement, 12 1/2 lignes, monometallic screw balance, self-...