Executive Sierra Pen:
The Executive Sierra pen uses a Parker® style refill. The pen nib is exposed by twisting the bottom of the pen counter clockwise.
The pen refill can be changed by either twisting the bottom of the pen clockwise and unscrewing it completely or gently pulling the bottom section from the top section.
Remove the old refill and spring, replace the new refill in the spring and insert into the bottom of the pen and screw back onto the body of the pen.
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