R (0x52) lsb: 23.0
R (0x52) rsb: 28.0
R (0x52) right x-extrema: 666.0
R (0x52) x-advance: 694
O (0x4F) lsb: 54.0
O (0x4F) rsb: 54.0
R (0x4F) right x-extrema: 744.0
Original kerning value: 0.000 em
Original kerned x-advance: 0.694 em
Original x-extrema offset: 0.082 em
Original in-ascender x-extrema offset: 0.082 em
Autokern
R (0x52) lsb: 2.0
R (0x52) rsb: -5.0
R (0x52) right x-extrema: 645.0
R (0x52) x-advance: 640
O (0x4F) lsb: 7.0
O (0x4F) rsb: 8.0
R (0x4F) right x-extrema: 697.0
Autokern kerning value: -0.077 em
Autokern kerned x-advance: 0.563 em
Autokern x-extrema overlap: 0.075 em
Autokern in-ascender x-extrema overlap: 0.075 em