Leyton Orient have signed striker Armand Gnanduillet from Chesterfield for an undisclosed fee.
The 23-year-old, who spent three years at the Spireites, has penned a two-and-a-half-year deal.
The former Ivory Coast Under-20 international made 82 league appearances for Chesterfield, scoring 10 times for the League One side.
Meanwhile, first-team coach Kevin Nugent has left the O's after the arrival of Kevin Nolan as player-boss.
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