Upgraded Jr. Gentleman I pen kits. There are some improvements on the threads in center band and nib, the pen works much better.
Requires Bushing Set: RZ-FP51#-BU
• Upper Barrel: 12.1mm Drill Bit
• Lower Barrel: 10.4 mm Drill Bit
Have tested these with the following and the fit perfectly:
- Upper Barrel – 31/64″
- Lower Barrel – 27/64″