Belarus-50 roubles 2000 (P#25)

Hello everybody,

I have in my collection a banknote (serial Tч ) of 50 roubles 2000 (P#25) with value spelled as ПЯЦЬДЗЯСЯТ, but without a security thread.

Does  anybody  have  more  information  about  such  thing as no security thread?  

Many thanks

This is right. There should be no security thread on such banknotes.