Accompanied by Uhrenmuseum Glashütte Certificate and copy from the registers confirming sale of the present watch on 23 January 1914 to Fa. Stern & Co., Frankfurt a.M., for the amount of 658.70 Marks. Furthermore delivered with a later A. Lange & Söhne presentation box containing a later blank certificate.
The Karussel or Carrousel was patented in 1882 by the Danish watchmaker Bahne Bonniksen who had immigrated to England.
The Karussel and the Tourbillon are both revolving escapements with the escapement placed on a small rotating platform, a device to eliminate errors of rate in the vertical positions.
The Karussel escapement however is driven by a fourth wheel, which is not fixed but rotates within the platform. Hence it is turning at a much slower rate than tourbillon carriages, varying from 34 to 52.5 minutes per full rotation depending upon the design. It is also more robust and easier to produce than a tourbillon, hence less expensive.
Richard Lange further developed and improved Bonniksen's invention and manufactured probably as of 1901 around 100 watches with karussel movements, mostly in gold cases and with or without up and down indicator.
The present watch appears to be the only example of a Lange karussel watch with up and down indicator known featuring an openface Lucia style case and enamel dial.
Similar watches are described and illustrated in A. Lange & Söhne - Eine Uhrmacher-Dynastie aus Dresden by Reinhard Meis, pp. 222-223.