YouTube

 

   

TI 502 01Model: TI-502-01 Code: OkTI 502 01 00
Battery:
  2 x 396
WCase: black plastic WBand: leather matching bracelet Face: red 
Manual: Yes Box: No  Light: led
Year: 1979 Price: $ 19.90
Function: The watch has five functions- hours, minutes, seconds, month and date
Info: 
same model in various color TI-502-02 TI-502-11