This is a Seiko Hi-Beat Automatic ladies' vintage watch, highly interesting in terms of engineering.

Specific details of this watch:

Model (Reference Number): 2706-0070

Movement: Automatic (self-winding) with Hi-Beat system (high frequency 28,800 bph), resulting in a smoother and more accurate seconds hand movement.

Case and bracelet: Stainless steel

Functions: Day and date display; this model is often bilingual.

Number of jewels: 21 jewels

Era: Produced between 1970 and 1979 (from the case back code 0D3941, it is estimated to have been manufactured in October 1970).