Sheaffer USA - less than 10 years ago (They still make Preludes.) We have not been able to gather any information about this pattern, and we think it's a prototype. We posted on FPN and no one recognized it.
Length
5-1/4"
Filling System
Takes Sheaffer ballpoint refills. The refill in the pen works well.
Color
Barrel is made of the same celluloid used by Sheaffer for the Balance 2 "Aspen Glow" special edition, with clip and trim in shiny silver-colored plate.
Condition
Excellent condition. No cracks or chip. There's a little discoloration to the clip, as can be seen in the photo.