I have some very heavy silverplate forks with this on the back...it appears to be a symbol with 'CCCD' also, '3p30K' and '(the symbol for pi) HW' or MHU? and again another symbol that is so hard to see and/or photograph.
Your forks are Russian. What appears to be MHU are actually the kyrillic letters MNZ which refer to the material they are made of, a copper, nickel and zinc alloy. 3p30K is actually the price, 3 Rubles 30 Kopeks.