This is an entirely original and finely-preserved early Radius No. 5, complete with the "special" silent burner (D 5/37 - the D 4/37 was also available for smaller models), with (on this early example) an integral pilot lighter and very shallow spirit cup. Early examples of this special silent burner have a larger perforated hood (No. D 433 - there is no inner cap) than later ones (this burner was a popular and long-lived alternative to the later-style silent burner no. 15/37 - presumably developed in order to distinguish Radius products from Primus after the "split" that led to Radius' foundation in 1913). Like many contemporaneous Primus & Svea examples, this stove features an early "Mickey Mouse" filler cap. It also includes the original cast-iron "Radius" trivet which was available during the teens and twenties, prior to the distinctive Radius pressed-steel trivets from the late 20s and 1930s. One of the photos here shows a line-up of three Radius stoves: the present No. 5 (pre-1920) and 1930s examples of the rare No. 3 and common No. 5 Senior, which for a time was differentiated from the No. 5 by the burner (No. 15/37) used only for the S:or).