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Montblanc 139 Broken Barrel End

fountainbel

By fountainbel
in Montblanc

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fountainbel Antique

fountainbel

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Hi all,

 

Just repaired a beautiful MB139 on which a shell broke out at the barrel filling knob end.

 

Aged celluloid can become very brittle over time and any radial pretension may lead to hairline cracks, triggering breakage.

 

The thread fit barrel/ filler unit being very tight most possible caused the initial hair line crack.

 

The barrel length was reduced 10mm at and a 0.8 mm deep diameter step was turned at the outside of the barrel just facing the edge of the lengthwise ink window lines.

 

A new hard rubber sleeve -just "slide" fitting over the barrel step - was installed and fixed with epoxy.

 

At the back of the sleeve the 36TPI threads were cut to receive the filler unit with a light radial backlash between the mating threads.

The barrel cap threadfit was loose and did not fit anymore.

The cap was succesfully schrunk locally after heating up the cap locally, so threads are now perfect again !

 

Another beauty recovered !

 

Francis

 

 

 

 

http://i62.photobucket.com/albums/h89/fountainbel/Repaired%20Vintage%20fountain%20pens/shell004Kopie.jpghttp://i62.photobucket.com/albums/h89/fountainbel/Repaired%20Vintage%20fountain%20pens/William139001Kopie.jpg

Edited by fountainbel
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Chi Town Collectors Item

Chi Town

Posted
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NICE Repair job!!! You saved a Beautiful pen there.

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pavoni Vintage

pavoni

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Great work. Great photos. :notworthy1: It is thanks to your excellent posts that we MB vintage sufferers can sleep soundly at night, knowing you are only an e-mail away

 

By the way, my local dealer has had my Lexus in for a week (again). Can I send it to you for repair please Francis? :embarrassed_smile:

 

Pavoni.

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Rowbo Extremely Rare

Rowbo

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Posted

Francis, thank you for sharing yet another wonderful example of your craftsmanship.

 

With my interest in pens only having been awakened quite recently, I still have a lot to learn - and following your your work is certainly one of the most interesting of ways to do this.

 

I did wonder why you used BHR instead of celluloid - I am sure you must have had a very good reason, would you tell us, please?

 

I thought it may be as simple as availabilty, so I did some searching and came across this site - 'American Art Plastics'. For those who do not know this site, it is a good read.

 

Best regards

You don't know what you need until you realise you haven't got it.

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fountainbel Antique

fountainbel

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Francis, thank you for sharing yet another wonderful example of your craftsmanship.

 

With my interest in pens only having been awakened quite recently, I still have a lot to learn - and following your your work is certainly one of the most interesting of ways to do this.

 

I did wonder why you used BHR instead of celluloid - I am sure you must have had a very good reason, would you tell us, please?

 

I thought it may be as simple as availabilty, so I did some searching and came across this site - 'American Art Plastics'. For those who do not know this site, it is a good read.

 

Best regards

Note that only the barrel of this pen is made from celluloid : the cap, section and filling knob unit are all BHR.

BHR is also less sensible for cracks

I'm aware of the celluloid AAP sells, but they don't have black celluloid as far as I know.

Black celluloid in larger diameters is extremely difficult to find.

I once was lucky and bought a 16mm vintage bar, but unfortunately I've already completely used it...

Regards, Francis

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fountainbel Antique

fountainbel

Posted
  • Author
Posted

Francis, thank you for sharing yet another wonderful example of your craftsmanship.

 

With my interest in pens only having been awakened quite recently, I still have a lot to learn - and following your your work is certainly one of the most interesting of ways to do this.

 

I did wonder why you used BHR instead of celluloid - I am sure you must have had a very good reason, would you tell us, please?

 

I thought it may be as simple as availabilty, so I did some searching and came across this site - 'American Art Plastics'. For those who do not know this site, it is a good read.

 

Best regards

 

Hi Rowbo,

Note the barrel is the only part of this pen made in celluloid, given the transparency needed for the ink window.

All other black parts are hard rubber, which is considerably less sensible in becoming brittle over time.

I'm aware AAP sells celluloid, but unfortunately not the pure black.

Celluloid in larger diameters- over 10mm- is extremely difficult to find.

I once had the chance buying a vintage 5/8" bar, but unfortunately its all used by now......

If anybody knows were I can buy 16mm black celluloid barstock I would be gratefull !

Best regards, Francis

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fountainbel Antique

fountainbel

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Great work. Great photos. :notworthy1: It is thanks to your excellent posts that we MB vintage sufferers can sleep soundly at night, knowing you are only an e-mail away

 

By the way, my local dealer has had my Lexus in for a week (again). Can I send it to you for repair please Francis? :embarrassed_smile:

 

Pavoni.

 

 

Sorry Pavoni, but I can' help you with that one !

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georges zaslavsky Museum Piece

georges zaslavsky

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outstanding work :thumbup:

Pens are like watches , once you start a collection, you can hardly go back. And pens like all fine luxury items do improve with time

 

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Mags Vintage

Mags

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Such care and skill demonstrated with a truly wonderful outcome. Thanks for sharing the pictures also.

Rob Maguire (Plse call me "M or Mags" like my friends do...)I use a Tablet, Apple Pencil and a fountain pen. Targas, Sailor, MB, Visconti, Aurora, vintage Parkers, all wonderful.

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fountainbel Antique

fountainbel

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Such care and skill demonstrated with a truly wonderful outcome. Thanks for sharing the pictures also.

 

Thanks maguirer, much appreciated !

Francis

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rhr2010 Extremely Rare

rhr2010

Posted
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Wow....notworthy1.gif...Congratulations Francis, your posts are always amazing!

" I have no special talents. I am only passionately curious." -- Albert Einstein

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Paul Raposo Collectors Item

Paul Raposo

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I doubt I will ever get to this level of repairs, but it is inspiring. Excellent work, Francis!

 

http://img850.imageshack.us/img850/1935/cmicsfee.gif

There are a thousand thoughts lying within a man that he does not know till he takes up a pen to write.

--William Makepeace Thackeray

 

Visit my blog to see the pens I have for sale

 

Paul's Pens

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Sidestreaker Extremely Rare

Sidestreaker

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Impressive, :notworthy1: :notworthy1: :notworthy1:

 

somehow for me, this makes the pen even more valuable. Great stuff! :thumbup:

My link

 

Life is like Chinatown signage, its cluttering, confusing but everything that you need is there, just have to look harder....

 

http://i691.photobucket.com/albums/vv272/sidestreaker/lifestyle/logo.jpg

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fountainbel Antique

fountainbel

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Thank you all for your nice comments !

FYI,Below a rough sketch showing the way I've repaired this beauty.

Francis

http://i62.photobucket.com/albums/h89/fountainbel/Repaired%20Vintage%20fountain%20pens/MB139001.jpg

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yehyamorcos New

yehyamorcos

Posted
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I have sent my montblanc 139 to Francis to restore the broken end of the barrel. I have received the pen today and i was hoping to have it done very well .When i started looking at the pen i honestly felt that Francis just replaced my old pen by a new montblanc 139.

His work is more than perfection and i really need to write one hundred pages about the genius worke of this great Master.

Thank you very much Francis

Best Regards

Yehya Morcos

Senior Consultant Neurosurgeon.

Sulaiman Al Habib Medical Group

Saudi Arabia

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