Nib: Shorthand 1554
Esterbrook H Pen: Gregg Shorthand Black lever-fill Dollar Pen Dollar pens are so called because they cost $1.00 in their time. Dollar pens are distinguished by their two hole clip and flat top and barrel appearance.
*The Osmiroid nibs that interchange with the Esterbrooks are the ones for the Osmiroid "65" fountain pen from the 1960s and 70s