BSR Dual (Years Unknown)

No solid evidence exists that a combined "BSR Dual" product was ever made. The name looks like a cataloguing artifact that lumps together two separate turntable makers, BSR and Dual. The period press treated them as competitors, not partners. Nothing in the surviving record describes a machine actually called the BSR Dual.

What the record does show is the two brands being compared head-to-head. BSR's own advertising, appearing in Audio (June 1973, p.15), compared its 810 against Garrard's Zero 100, Dual's 1229, and Miracord's 50H-II, arguing that a $150 BSR turntable delivered what the others charged $200 for. A year and a half later, High Fidelity (November 1974, pp.49–50) still listed BSR and Dual as separate brands in its phono-cartridge compatibility charts, pairing a 66LE/X cartridge with, among others, the BSR 610AX/510 and the Dual