DESK SET - PEN WITH U.S. CONGRESSIONAL SEAL SHEAFFER 509H US Senate EUC RARE c1

DESK SET - PEN WITH U.S. CONGRESSIONAL SEAL - SHEAFFER 509H US Senate EUC RARE.
This is a heavy desk set by capital SHEAFFER pen company, made in Fort Madison Iowa, USA. The model is the 501 H, and it comes with the 20 FD pen. This pen is a cartridge pen Im sure it needs a new cartridge there is a nib included. The number 44321 is also on the label on the bottom. As is 501H/500. This is from the 1950s or the 1960s. It is special because it has the Congressional seal imprinted on the top with the words United States Senate. I cannot find another one of these on eBay or any other site. The pen unscrews from the holder. The holder pieces are all tight the felt on the bottom is tight. This is in excellent condition I dont see any scratches. The nibs is Schaefer on it as well. the end of the pen is not as smooth as the barrel of the pen. It does unscrew and inside there is a metal ink well. Look at the last two pictures. The base measures approximately 4 x 4