The F-40 Valencia was introduced in 1954 and stayed in the catalog until 1963. In 1973 is came back as the Bluegrass F-40. In 1976 it changed from a Mahogany neck to a Maple one. It's always had a arched Maple back and maple sides with a spruce top. I suspect the "bluegrass" name got dropped at some point after 1977.
The body has/had a 16" lower section and was 4-1/4" deep. Of course, Guild being Guild, could slightly alter those specs from era to era.
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2010 Guild F47R
2009 G & L Tribute "Legacy"
1975 Ovation Legend
1986 Ovation 1758 12 String
2007 Walden G2070
2008 Guild D55 Prototype
1998 Guild Starfire IV
2016 Guild Newark St. X-175 Sunburst
1996 Ovation 1768-7LTD " custom "
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