I have a quantity of green 7 segment displays labelled bd1-561 gu-a21.
leds-7-segment-displays
The pin sequence 7,6,4,2,1,9,10,5 is the sequence of the segments A,B,C,D,E,F,G,DP.
Note that 3 and 8 are missing, they are the common 'odes (cathode or anode).
