Bad Nauheim: S. Pahlow, 2008. Third Edition. Hardbound. Royla octavo in dust jacket, 544 pp., color photos throughout, color schematic drawings. Very Good. Item #88278
Text is in German. Copy 284 of a limited numbered edition signed by the author. No copies of this edition in any library. Only three copies listed worldwide for any copies of the first two editions. Touhrbillons are a very sophisticated component of very fine watches that increases the accuracy of the watch escapement.