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Decimal scales
In Response To: Re: Doubtful listing: Heuer chronograph,Valjoux 72, dial, NO ()

: By the way, do Heuer experts know what the decimal scale instead of
: the usual tachymeter on this dial is for?

For making calculations on time recordings without having to convert back to hh:mm:ss every time.

More here: http://iwmagazine.com/2012/05/16/more-than-time-2/

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