[quote name='dougal' timestamp='1364468548' post='2026829']
This is the best photo I can find on-line: note the crazed sparkle finish under standard blue:[/quote]
That's his '78 precision. It was also black originally.
On this tour he used this bass and his blue signature bass.
(At least for some part of the previous Maiden tour these two were backup basses to his "original" bass (now white, a '72 precision) and a new custom built one to the exact same specs, colours, pinstripe and sticker as the '72. You'll spot the difference between the two white ones, the custom built new one has the waterslide decal.
In the recent past tours he has also had his red one as a backup. Many different basses, but all precisions and pickups individually rewound to have the same sound character.