This is Twindows (Twist Windows). It is made from some Bloodwood and Osage Orange , some Brass and aluminum and a cigar transmission with a parker type refill . It is unique in that you operate the pen by twisting the inner barrel (the Osage Orange part) to extend or retract the refill . It works very smoothly and has a nice feel to it , I even got this one the right length . The refill is replaced by unscrewing the nib .
