This is a c1920s vintage Swan self filler Mabie Todd&Co Ltd NoSM100/60 black chevron type pattern fountain pen.It has a Swan Mabie Todd&Co 14ct Gold 1G nib which like the pen is in a very good condition but it is sold as unworking as it would need a service to make it work.It’s overall measurements are 12.6cm long x 1.1cm in diameter.