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Many of you may be aware of this footage, but for those who are not: the December edition of "The Robb Report" includes as an advertising feature a terrific DVD with 27 minutes of footage: the 'Walter Lange' and 'Manufactury' videos, then truly remarkable animations of the Richard Lange, Lange 1 Time Zone, Double Split, Langematik Perpetual and Dato. It's a must have for any Lange fan and for anyone seeking a better understanding of the inter-relationship of the various parts of the movements.
Cheers,
pplater.