This trader advert from May 1950 shows the Strad Radiogram Model 502 from R. M. Electrical Ltd.  Stuffed with extras - which goes to explain the pretty high price.

For Customers who want that little extra!

Here is a radiogram specially designed for those that want something a cut above the rest.  Internally it is tops in technical perfection, with selectivity, sensitivity and tone of the highest standard.  Outside the beautifully proportioned walnut veneer cabinet adds grace to any home, is well finished, with two compartments for records.  Above all, Model 502 carries the name "Strad" ... and assurance to your customers for years of trouble-free entertainment.

5 valves, 3 wavebands.  Two-speed tuning control and large illuminated glass scale. Four position tone control. Garrard auto record changer for 8 records mixed.  AC mains 200/250V, 40/60 cps.  Usual guarantee.  Dimensions 32½" x 31" x 16".  List Price £71 - 19 - 3d (tax paid)

It's sound - if its [sic] Strad