On A Whim Woodworks in Jonathan Brooks Peacock Koi Resin Fountain Pen
This pen has been lovingly used. Â It comes complete with its original box. Â It is equipped with a Bock Titanium Fine nib.
From On a Whim Woodworks website:
Peacock Koi in the Zephyr profile has 13 mm cap threads, a Jowo  #6 and a premium Schmidtt converter.  It is widest at the top and tapers the length of the pen and has a nearly flush joint. Material by Jonathan Brooks.