Condition: 
The pen is in overall very good condition with nice color on the cap and the typical darkening on the barrel, there are no cracks or personalizations.  The ring top is firm and in good condition, as shown. The triple ring, gold filled cap bands (which makes this a "De Luxe" version) are firmly attached and in lovely condition. The barrel imprint has some light wear and is readable.  The pen has been cleaned, a new ink sac installed, it has been water and ink tested.  The pen fills nicely and writes well.  This is a lovely early 1930's Duofold.
 
Restoration Work
The cap has been fully disassembled and cleaned
Nib and feed have been ultrasonically cleaned 
A new ink sac has been installed with 100% pure medical grade talcum powder
The pen has been lightly polished
The pen has been water and ink tested
This pen is ready to write