Date: 1955. Owner unknown
The 14J has three valves. Notice that the text below doesn't include the phrase "Lustre-Conn finish". Which might account for the state of the lacquer. The 14J doesn't appear in Conn's 1966 catalog, so it must have been discontinued in either 1965 or 1966.
What Conn said in 1959:
The leader in the "lightweight" bass design. Weighs only 18 lbs. Bore is not reduced but precision engineering developed this bass to meet the need of a bass light enough for the grade school player and still adequate for the "brass bass sound" in concert band and orchestra. Only Conn can offer such a bass with these features: full Eb bass tone, Crysteel smooth action valves, hydraulic expansion protexts inside bore tapers, even scale (only 31" long, bell size 16").
Also available: Satin silver finish with silver bell.