These Esterbrook branded stylus/ballpoints were never taken to market, but are pretty cool. The pens did not meet the Esterbrook branding criteria, but if you're looking for a cool dual feature in a pen then this could be for you.
Twist action Parker style refill
Brass body
textured pattern engraved barrel and cap
stylus top
steel tension clip with Easterbrook logo engraving
traditional Esterbrook packaging