For your consideration, we are offering for sale this Scarce circa 1924 Conklin Senior Endura Black Hard Rubber Fountain Pen. This fountain pen has been thoroughly taken apart, cleaned and put back together and now is in wonderful writing condition.

The Endura Senior Long Model was a transition model between the Duragraph and the lever-filled Endura. This is the largest size made in this model.

I have ultrasonically cleaned the NIB and feed. I hand cleaned the outside and inside of the cap and barrel with mineral oil. Replaced the old rubber sac with a new sac. Hand polished the Conklin Gold Filled Clip, Smooth Cap Banding, and 14K Conklin Endura NIB. I have cleaned, lightly buffed, and polished the barrel and cap to bring back the vibrancy of fountain pen and to protect the red hard rubber. This Conklin Endura is a Senior Long model size that measures 5 3/4" capped and 7 1/4" posted.

This Conklin is made of Black Hard Rubber. The hard rubber displays a black color with only a slight bit of oxidation. The black hard rubber is smartly offset by the red banding displayed on the barrel and cap. This fountain pen cap and barrel are in excellent condition with no chips, cracks or repairs and the cap always securing tightly to the barrel. There are some very light scratches and just point it out for clarity sake - I personally wouldn't take a chance trying to remove the scratches and possibly compromise this extremely scarce pen. The cap has the Gold Filled Conklin PAT May 28, 1918, Clip with the Smooth Gold Filled Cap Banding. The clip and cap banding show no gold fill loss or brassing - the cap banding does show some minor dings or blemishes. The barrel imprint is extremely difficult to see and nearly worn away and only really see a trace of the "trademark" and the "A" in Endura. The crescent filler is stamped on both sides, "CRESCENT" on one side and "RED US PAT OFF CRESCENT" opposite side. I have tested the Crescent filling mechanism with water and fills as it should. The Crescent Filling System works great and operates as it was intended to.

This Conklin Endura has a 14K Conklin Endura Nib. The actual iridium top on this Endura Nib has a medium point measuring roughly .69mm when measured with digital calipers. When writing a sample with this NIB, it writes with a medium to a double broad line. In the writing sample provided, the medium line measures at .69mm and will flex to a double broad stroke measuring at 1.29mm with medium to firm pressure when measuring with digital calipers. The nib is writing smoothly and is a pleasure to write with.

Any specks of white in the images are from the cotton that I used to clean the barrel and cap.

This is one of those vintage Conklin Endura Senior Long Crescent-Fill Fountain Pens that is extremely rare that individuals rarely get a chance to secure in their collection. For the collector, this is a "holy grail" vintage fountain pen as they only made these in 1924. I would consider the pen to be in Very Fine condition - if the imprint was not worn I would grade it excellent. It is very scarce and should be a deserving collection. This Conklin is ready to write if you choose to do so, or just add it to your writing arsenal collection.
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