This early Parker "51" dates to 1944. It's a "double Jewell" pen with a rare "Window Pane" design gold cap. It has a Blue Diamond clip and the black pen is in near mint condition with a strong imprint. It's a "SpeedLine" style vac. filler, characteristic of earlier 51s. Several variants of this cap design are known. For the detailed collector, this is an 8 ring style cap rendered in 1/8 14K GF. (D11292)