Soviet made telephone, manufactured by the Пермский телефонный завод (Perm Telephone Factory) in 1977. TAH (which is in Cyrillic and translate to TAN) stands for desk top telephone apparatus and 70 presumably stands for 1970, its year of introduction.
This telephone has a typical angular design, found in many USSR telephones of the same era. A development of earlier similar looking telephones, this is a typical 1970s thermoplastic telephone. Inside is a small printed circuit board and an adjustable ringer mechanism with 2 gongs. Most of these 70s telephones also had a dial card or a number card frame, which this model does not have.
The dial mechanism is an almost exact copy of the German NrS 38, such can be found on the W48 and Heemaf 1955 and many other telephones.
Interestingly the price is printed on the bottom, showing it once cost 20 ruble.
This telephone is somewhat smaller than other telephones and workmanship is a bit rough. Although there seems to be a tendency to use as little material as possible and make the design as simple as possible, it is not as flimsy as other eastern European telephones from the same era.