These lanterns were all featured in a small booklet of BTH's entire product range. But they don't represent all
BTH's lanterns but merely a sampling.
The lanterns were being sold under the Mazda tradename, which BTH used for
valves, lamps and lanterns (BTH having bought the Mazda name from GE in
1911). As the lanterns themselves have BTH logos, collectors tend to ignore the Mazda
BTH were ahead of their time in several ways - they offered side and top entry options for most of their
lanterns, whilst their sodium lanterns were sleek and well designed (unlike the bulky lanterns being offered by their
competitors). On their other hand, the fluorescent lanterns were large and unwieldy - just like their competitors.
The BTH and Metrovick lines would ultimately be merged and sold as
AEI lanterns, the precursor of the Thorn line - but none of these lanterns resemble the
examples from the Alpha, Beta or Gamma ranges in any way.