In the1902 Sears and Roebuck catalog replica says the Wirt pen was the best pen made.
Pg 98.
A Lady's pen, but with a hard rubber cap that is posted for $3.00....., yours has the rest of the ornate cap at $3,75
Number 2 nib, fine, medium or stub...gold pen......nibs still being called pens then.
The nib has a feed and a top 'feed' also....Don't know the name of that, but such nibs existed a long time; not just by Wirt.
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A Wirt pen is on my 80'th birthday list.....if not then my 90'th. Weirder things have happened.