If no one here has the answer, ask the guys at Let's Talk Guild:
http://letstalkguild.com/ltg/forum.php
Hans Moust (Author/Guild expert etc.) can probably tell you what the man who built your guitar had for breakfast that particular morning.
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'13 Guild D55
'13 Guild Custom Shop F20
'08 Guild JF-48
'18 Guild Jumbo Jr.
'13 Recording King "Dirty Thirties" Single-O
'13 Epiphone DR-212
Sigma DMISTC
PRS Custom 24 Artist
Fender American Strat
Fender Modern Player P90 Telecaster
Epiphone LP Special P90
Epiphone LP Standard
Various others...