The bat strat, looking rather worn

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One of Billy's '57 Reissue Stratocasters, this sunburst model made in 1990 has been painted silver and decorated with bat stickers, and is the guitar Billy said he'd want to be buried with.
[wiki]

Used with a Reeves 'Jimmy' amp head during the Oceania sessions to record Chimera, as mentioned on Billy's twitter on 2011/07/12.

Also tweeted by Billy on 2011/09/05: "Bat strat>Companion wah>Beano Boost>vintage Orange head=happy Labor Day everybody"

The Bat Strat even has its own twitter account.