On A Whim Woodworks Zephyr in Teal Agate Fountain Pen
This pen has been lovingly used. Â It comes complete with its original box. Â It is equipped with an Extra Fine Steel nib.
From On a Whim Woodworks website:
Teal Agate in the Zephyr profile has 13 mm cap threads, a Jowo  #6 and a premium Schmidtt converter.  This is the original of the Agate series.  It is widest at the top and tapers the length of the pen and has a nearly flush joint. Material by Bob Dupras.