9BSI 1922 Kansas City, MO.

The operator was Paul Peltzman, W9BSI and 9BSI. He was active from 1913 to about 1928.
He was the owner of Mutual Photographic Company and a War surplus company, both in Kansas City, Missouri.
He served in the military 1942-1945.
He was a Kansas City, Missouri native, born May 10, 1907 and died April 18, 1975.

From the estate of 5KC
QSL, Info courtesy of W5KNE