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Parker Senior Duofold - peculiar phenomenon...

Claes

By Claes
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Claes Antique

Claes

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Imagine a Parker Senior Duofold, made in Denmark. The section screws into the barrel's inner thread, as usual. The cap screws onto the barrel's outer thread, as usual. BUT after a few days' use, the pen looks like in the image after a de-cap.

 

I interpret this peculiar phenomenon thus: Less force is needed to loosen the section from the barrel than what is needed to loosen the cap from the barrel.

 

Anyone got a better explanation?

 

Have fun!
Claes in Lund, Sweden

 

 

seniorDuofold.jpg

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VacNut Collectors Item

VacNut

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Funny, I was just discovering the same condition on two lady Duofolds this morning. My other UK Duofolds do not have this problem. 
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Ron Z Museum Piece

Ron Z

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Parker was known to use thread sealant on the section threads of Duofolds.  A dab here would keep it from unscrewing.

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Claes Antique

Claes

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Strange ... it's the first time in 61 years that I encounter this oddity :-)

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VacNut Collectors Item

VacNut

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My Duofolds are Aerometric fillers. The barrel has to unscrew so the pen can be filled. I took another look at it appears the threads are worn so they no longer engage the threads of the section.

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FarmBoy Museum Piece

FarmBoy

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One can probably find sections and barrels as parts. 

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