Westone Quantum bass (X850)

First appeared in the Jan 1985 US pricelist at $499.50 including gig bag, (Probably introduced earlier, the serial number on mine indicates that it was made in 1984) in the August 1986 pricelist the price had increased to $529.50 and at this time it was only available in black. Does not appear in the later pricelists

Quantum front Quantum backQuantum

These were originally supplied with a gig bag, but it's unusual to come across one that still has it.

Quantum gig bag