Bell size is 24.5” and the bore is .689”.
” ‘KING’ / MADE BY / THE H. N. WHITE CO. / CLEVELAND / OHIO” inside oval within floral engraving on bell.
” 1 / ‘KING’ / MADE BY / H. N. WHITE / CLEV’D. O. / 89540″ on first valve. “2”, “3” stamped on second and third valves respectively.
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https://simonettitubacollection.com/ins ... ousaphone/