PRECIOUS-Platinum drops as S.African wage offer eases supply fears

* S.African miners offer to raise wage, seek to end strike * SPDR posts 8.39-tonne outflow, biggest since December (Rewrites with new details on strike, adds comment) By Frank Tang and Clara Denina NEW YORK/LONDON, April 17 (Reuters) - Platinum prices fell to their lowest in more than two weeks on Thursday, reversing initial gains after South Africa's biggest platinum producers offered to raise wages for miners in a bid to end a 13-week-old strike that has curbed metal output.