A. Lange & Söhne

skyeriding
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Thanks for the comments foversta,

1) This is something I overlooked. It's quite easy to get lost in the chronograph module on the displayback side, I forget there is still another layer of movement for the timekeeping side!

I'd like to at least back up my claims however, that the chronograph module of the double split is based on the L951. Here is a link to the L951.6 and L001.1 overlayed. Besides the updated reset lever of the Dato up/down, it can be seen the rest of the chronograph movement architecture is practically identical, while the rattrapante is built upon it. Therefore, I reckon that the going train side underneath the chronograph has been optimised on the double split, maximizing use of the space without the big date of the datograph. As a 3Hz movement on the DS, perhaps the 4th wheel is modified?

To my knowledge, the three other standalone unique chronograph calibres Lange produce are the Tourbograph, the Rattrapante Chrono and the grand complication.

2) I vaguely remember reading that once now (your previous post?), thanks for the clarification. A Maltese cross is quite logical; limiting the range of mainspring that can be utilised to retain good accuracy. Perhaps they removed it as Lange was much more conservative in their earlier years? I'd definitely like to see photos of the going train and bigdate mechanism of the L951 for further study.

Regards, skyeriding This message has been edited by skyeriding on 2015-12-11 17:22:07

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