This Casio Watch Band is authentic. It's crafted with care. This Casio strap CASIO Part Number: 10347688 is compatible with the following watch. ASSOCIATED MODEL(S) CASIO G8900-1 Time Piece Division: Watch 2011 CASIO GA100-1A1 Time Piece Division: Watch 2010 CASIO GA100-1A2 Time Piece Division: Watch 2010 CASIO GA100-1A4 Time Piece Division: Watch 2010 CASIO GA100C-1A3 Time Piece Division: Watch 2013 CASIO GA100C-1A4 Time Piece Division: Watch 2013 CASIO GA100MB-1A Time Piece Division: Watch 2015 CASIO GA110-1A Time Piece Division: Watch 2011 CASIO GA110-1B Time Piece Division: Watch 2011 CASIO GA110MB-1A Time Piece Division: Watch 2015 CASIO GA120-1A Time Piece Division: Watch 2011 CASIO GA120BB-1A Time Piece Division: Watch 2012 CASIO GA300-1A Time Piece Division: Watch 2013 CASIO GAC100-1A Time Piece Division: Watch 2012 CASIO GAC100-1A2 Time Piece Division: Watch 2012 CASIO GD100-1A Time Piece Division: Watch 2010 CASIO GD100-1B Time Piece Division: Watch 2010 CASIO GD120MB-1 Time Piece Division: Watch 2015 CASIO GDF100-1A Time Piece Division: Watch 2011 CASIO GDF100-1B Time Piece Division: Watch 2011 CASIO GDF100BB-1 Time Piece Division: Watch 2012 CASIO GR8900-1 Time Piece Division: Watch 2011 CASIO GR8900A-1 Time Piece Division: Watch 2011 CASIO GW8900-1 Time Piece Division: Watch 2011 CASIO GW8900A-1 Time Piece Division: Watch 2011