| You apparently have a 5X+, which is not a Claude Gordon model (but is a rather unusual configuration). The MLP means your trumpet has a .464" bore, while the CG model has a .468" bore, except where is chokes down to .464" in the bell tail. The CG Benge was based on the 6X large-bore trumpet, with some modifications. I don't know if a model number, such as 7X, was ever applied to the CG Benge.
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John N. Nieuwguyski |