Commentary
a: K 1263+ SAA X 351
Mar-issar
b: 82-5-22, 169 SAA X 58
Balasî
c: K 185 SAA X 42
Balasî

al

In a the first two horizontals are not on top of each other and parallel but the lower one is further forward and slopes downward

in b the corresponding horizontals are on top of each other in both occurrences of the sign:

index

 

Sign not present.

 

index