The Blackbird fountain pen was made, by Mabie-Todd, in England in the 1930s. It is constructed in black chased hard rubber with a nickel plated clip and filler lever and a 14 Ct. gold nib.
This is a very fine example. The hard rubber shows no browning from oxidation and the chasing is strong and clear. The barrel imprint identifying the pen and carrying the 'Blackbird' logo is clear and crisp.
The original nib, also stamped 'Blackbird' has flex and gives good line variation, someone with a decent 'hand' would achieve impressive results.
At 12.3 cm. capped the pen grows to an impressive 15 cm. when posted for use and weighs in at only 15g. When the pen was made, almost 90 years ago, lightness was an essential attribute for a pen that could have been used for long periods at a time. The condition of this pen strongly suggests, however, that it saw little use.
Hard rubber pens with flexible nibs aren't recommended as every day writers to be carried around but are perfect for letter writing or simply for the joy of writing with style.