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Best estimates put this trumpet as being manufactured around 1956-1957.
Years of Crisis - 1950 Calendar Year 1956 was released on: USA: 30 December 1956
What's My Line - 1950 1956-01-01 was released on: USA: 1 January 1956
What's My Line - 1950 1956-01-08 was released on: USA: 8 January 1956
What's My Line - 1950 1956-01-15 was released on: USA: 15 January 1956
What's My Line - 1950 1956-01-22 was released on: USA: 22 January 1956
What's My Line - 1950 1956-01-29 was released on: USA: 29 January 1956
What's My Line - 1950 1956-02-05 was released on: USA: 5 February 1956
What's My Line - 1950 1956-02-12 was released on: USA: 12 February 1956
What's My Line - 1950 1956-02-19 was released on: USA: 19 February 1956
What's My Line - 1950 1956-02-26 was released on: USA: 26 February 1956
What's My Line - 1950 1956-03-04 was released on: USA: 4 March 1956