u/albrybry

This has been sitting in my parents attic for the last 30 years probably and my grandparents for who knows, 40/50 years before that.

Cant find any mention of The Edinburgh Radio House online although I know that was just the retailer.

Manufacturer: British Thomson-Houston Co. Ltd. (BTH), Rugby, England.
Model: Bijou Crystal Receiver
Instructions sheet: Fifth Edition, January 1924
Registration: G.P.O. Registration No. 361
Retailer: David Gardner Watson, Electrical Engineer, 126 Bruntsfield Place, Edinburgh (“The Edinburgh Radio House”)
Type Approved By the Postmaster General - BBC logo on the front.