OM1TB 1934 Guam

Felix L. Ferranto, U. S. Marines, W2BDU, Silent Key (1911-2002).

"O" stood for Oceania until 1929, but carried over on this call.
The "M" stood for the Marianas.

QSL Courtesy of W7BE
SK Info Courtesy of W5KNE
Callsign Info Courtesy of Wolf OE1WHC, QSL Collection at DokuFunk, Vienna