In 1981 only, the legend was changed to ХИЛЯДА И ТРИСТА ГОДИНИ БЪЛГАРИЯ (Хиляда и триста години България - Hilyada i trista godini Bulgaria, meaning One thousand and three hundred years [since the foundation of] Bulgaria), from the regular НАРОДНА РЕПУБЛИКА БЪЛГАРИЯ (Народна Република България - Narodna Republika Bulgaria, People's Republic of Bulgaria). A handful of 1981 error coins exist that carry the regular legend. You will have to read the lettering.
Seems pretty clearly 112 to me. I'm curious how you were able to come up with the two varieties, but not the solution. What resource do you use?