WEBSTER with sterling silver cap ( top ) and SHEAFFER CREST first model ( 1937-1940 ) . The curiosity on this two pens (besides the sterling silver caps ) is the threads on the end of section. But .... they are not the only ones because if you think a little you can remember the IMPERIAL ( Parker Vacumatic ).See the pics and enjoy.

 Details of the two sections and nibs.

And.... the third one!!!