Persian blue is one of our Sheaffer favorites. This Sheaffer Sentinel is an especially attractive vintage pen. The vacuum-fil filling system has been restored and works well. However, we are noticing an issue with it as it writes. The firm extra-fine 14k gold nib writes nicely, but it seems to deposit a little blob of ink every couple words. There is a dent on the right side of the cap, too. The rest of the pen looks fine with a little wear from use. This pen sports its White Dot on the tip of the blind cap! Really neat feature. 12.7cm capped.