Assertion: trombone's bore | /r/HasProperty | favoured for jazz
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Source sentences:
text: Small-bore, favoured for jazz, often compared with King 2B. Historical notes: according to the Conn Loyalist list, this designation was used for a #2 1/2 Bore Artists' Medium Bore with 6.5" or 7" Bell (Wurlitzer Special) from 1919-1939.