On the other side they are marked with the number of the testing house certificate, the initials of the proving house, the proof load, and the initials of the overseer.
Kwelinye icala aphawulwe ngamanani avavanywe ngesatifiketi sendlu, iziqalelo zeziqinisekiso zendlu, isiqinisekiso somthwalo, kunye neziqalelo ezongamelayo.