Ever Ready / BEREC Export Radio models using the same or very similar chassis. The BEREC Skyscraper and Skyscraper L26 vary in wave bands. Otherwise the differences are very minor (Harlequin doesn't have Sky Casket "closed" alarm as it's a completely different cabinet) and same schematic serves. Some Models such as BEREC Demon have both versions with an Ever Ready style case and a differently styled case. Neither the Sky Emperor or Berec Commander have LW

Since BEREC was for Export versions the two versions of "J" (Saucepan) were likely only marketed outside UK, and by BEREC.

Accuracy of year isn't indicated here. Check the models for currently believed year.

Berec	Ever Ready	Year	Style	using ...
Saucepan J-A3F (1954)	J (SW only)	1949	Table Radio	4 -
Skyscraper	Skyscraper L26	1953	Table Radio	5 - DK92
Saucepan J-A4F (1954)	J (SW + MW)	1953	Table Radio	4 - DK92
Skyscraper Mk.II	Spacemaster	1954	Table Radio no LW	8 - DK96
Harlequin	Sky Casket	1955	Portable or Jewel case	4 - DK96
Fiesta	---	1956	Battery/mains	5 - DK96
Ballerina	Sky Baby	1956	Hatbox Radio	4 - DK96
Calypso	Sky Princess	1956	Valise Radio	4 - DK96
Jester	Sky King	1956	Portable Radio	4 - DK96
Commander	Sky Emperor	1958	AM/FM  no LW	9 - DF97
Demon	Sky Leader	1958	Small Portable	6 - OC44
Matador	Sky Baronet	1958	Valise Radio	4 - DK96
Wizard	Sky Countess	1958	Hatbox Radio	4 - DK96
Spinmaster	Sky Gram	1958	Portable 45rpm player	4 - Trans.
Pioneer	---	1959	Table	4 - DK96
Auto Portable	Car Portable	1960	Docking Radio	6 - OC44
Musketeer	Sky Baron	1960	Table Radio	6 - XA102
Bambino	Sky Personal	1960	Small Portable	6 - XA102
Buccaneer	Sky Captain	1961	Portable Radio	4 - DK96
Brigand	Sky Prince	1961	Table Radio	6 - XA102

See this article about the Model C background and "All Dry" Models of 1939 to 1949

It also outlines the Ever Ready connection with Lissen. The Model J is probably the first BEREC set.