with metal shield cage and wingnut  bolt fasteners x 2   

   believed to have been sodium with screw thread bulb fitting   10.2 kg

    52 cm long   20 cm deep    42 cm wide   with metal brackets to support for wall or surface mounting support  

   the electrical fitting box attached to side is brass   

 not sure of age   1960,s or 70,s    

 very sturdily made   good used condition   ,untested   offered for spares etc

 collect surrey gu6 or post parcelforce tracked