Siemens RL 173, 197?, made in Germany

Link: 

Country: Germany
Manufacturer / Brand: Siemens; D (S.& Halske / S. Electrogeräte)
Year: 197? Type: Loudspeaker, headphone or earphone 
Wave bands - without 
Details 
Power type and voltage No Power needed 
Loudspeaker 4 Loudspeakers 
Power out 
Material Wooden case
Notes
Dimensions (WHD) 550 x 550 x 200 mm
Net weight (2.2 lb = 1 kg)
Price in first year of sale ?
Source of data ?