If you've got an inspection mirror you should be able to put it inside and see what the bracing pattern is like. Classical guitars tend to have bracing running across the guitar either side of the soundhole, and then more bracing in a fan pattern spreading out from the soundhole on the rear of the top, roughly with the centreline of the guitar, something like this:
Steel string acoustic guitars generally follow an X-bracing system, which provide more structural support for the top.
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