I believe that this is a Sinn 140; purpose being to allow the wearer to track GMT and GMT plus one [for example, England and Germany]; I suppose it could also be used for Atlanta, GA and Anniston, AL (or New York and Chicago) but these are probably not the markets that Sinn (or Lemania) had in mind).

Jeff

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: Hello Brian, it was something produced in the 70's - 80's of the
: last century.
: It tried to imitate the GMT feature for central Europeans - but of
: course now it only works in the wintertime period. I have seen a
: few of them, mostly Sinns.
: Typically this pseudo-GMT hand is bright yellow and arrow-shaped -
: actully this 'part' of the hand, because as you correctly state
: it is solid with the main hour hand.
: To me, it is a curiosity and nothing more - and frankly as the
: L1340 is already pretty busy with the 4 central hands, adding a
: fifth is a bit of overkill even for a L5100 lover like myself.
: Hope this helps
: Fabrizio