Accompanied by Charles Frodsham certificate of origin stating that the movement was supplied by Nicole Nielsen & Co. at a cost of $75 and the watch was entered into Frodsham's stock in 1909.
Also accompanied by a copy Kew A certificate stating that watch No. 09269/12166 was tested between 17th May and 30th June 1909, attaining a mark of 91.8 A e/g. It should also be noted that the Kew records show that No. 09269 was placed as the sixth best watch tested in 1909.
The split serial number of this watch is derived from the Nicole Nielsen ebauche number 12166 and the Charles Frodsham serial number 09269.
This watch is illustrated and discussed in Das Tourbillon by Reinhard Meis, p. 210.