N-PCK4 1926 Holland

According to The U.S. Department of Commerce (Radio Divison), Radio Service Bulletin #156, published March 31, 1930, the operator was C. A. Gehrels, XEN0QQ, PA0QQ, of Eindhoven.

QSL from the estate of G2BJP
Courtesy of G3NDC
Info courtesy of W5KNE
XEN0QQ info courtesy of F2VX