Parker 51 and 61 Nibs

Parker 61 nibs can easily be adapted to fit into a Parker 51, follow the two simple steps outlined below, and then fit the nib as normal;  

1. Bend the tab at the lower end of the 61 nib downwards to lie flush with the body of the nib  

  It should look like this...  

2. Lift the upper tabs slightly to allow the deeper Parker 51 feed to be positioned correctly.  

It should look like this...