Replica Montblanc 139 "full Demonstrator"

[fountainbel]

Hi all!

I couldn't resist.....

After making my first "semi demonstrator" I've made a full MB139 demonstrator replica in natural transparent cast acrylic, below a few pictures.

Advantage being one can see the successive movements of the telescopic filler system and see the friction clutch in the filling knob working !

Since the fixation threads of the filling knob are left hand, first thing i had to do is making me a left hand tap.

This worked out rather well, so the first hurdle as taken successfully.

Given acrylic is more brittle compared to hard rubber , I've made a few improvements to the piston housing and made a new type brass collar.

The original brass collar mounted inside on the piston housing - which features the bended secondary anti rotation finger ,sliding in the lengthwise slot of the guiding bushing - was replaced by a thicker ring featuring a small transversal screw which goes through a bore in the piston housing collar and provides axial guidance in the lengthwise slot of the guiding bushing.

Doing so the brass ring is radially and axially secured.

In the original design there is a small collar on the piston housing which snaps behind the ring to hold the ring axially in place.

No problem with a hard rubber housing which is somewhat flexible , but delicate with acrylic, which is far more brittle.

This approach is also more maintenance friendly, by screwing the screw 1 mm out one can slide the guiding bushing out

I've also installed my "replica" logo in the cap top ,being a white triangle in a black hard rubber ring.

This logo will always be installed on replicas I make for my personal collection.

Being a protected trade mark.I don't want to use the MB star.

Francis

http://i62.photobucket.com/albums/h89/fountainbel/Home%20made%20fountain%20pens/P1010063.jpg[/urlhttp://i62.photobucket.com/albums/h89/fountainbel/Home%20made%20fountain%20pens/P1010065.jpg[/urlhttp://i62.photobucket.com/albums/h89/fountainbel/Home%20made%20fountain%20pens/P1010064.jpg

[Sharookh]

Fabulous........ I'm a buyer......!!!

[CS388]

Beautiful!

 

What is written on the cap ring?

Did you make all the parts - or are some of them Montblanc salvage?

 

Tremendous work, as usual.

Thanks for sharing.

[jamesgibby]

Great Work Francis!

[fountainbel]

Beautiful!

 

What is written on the cap ring?

Did you make all the parts - or are some of them Montblanc salvage?

 

Tremendous work, as usual.

Thanks for sharing.

Thanks CS 388.

I've used the original MB clip, nib, feed, cap rings and filler mechanism.

Making these myself is beyond my machining possibilities !

Note the filler does mechanism not has to be necessarily an 139, any 138, 136, 134 or even 132 filler can be used.

Francis

[meiers]

So this is what you do in your spare time.

These photos made my day. Thank you.

[da vinci]

Brilliant as ever Francis, thanks for sharing

Edited April 3, 2016 by da vinci

[Gudi]

Impressive work!

[camoandconcrete]

Amazing! I've always thought a 138/139 demonstrator would be perfect for drawing.

 

Awesome work!

[dubhe]

Fantastic work, I could spend hours looking at those photos.

[Raif79]

So beautiful. I would love to have one.

[Nathanb]

amazing, thanks for sharing

[falarcon]

Fantastic Francis. Thanks for sharing!

[zaddick]

Great work as usual Francis. Thank you for sharing it with us here.

 

I think you can also use the telescoping piston from the 14X series. Is that correct?

[fountainbel]

Thank you all for your friendly comments !

@ zaddick :

Sure , alternatively any 14X telescopic filler could be used, but then the filling system becomes slightly different.

The internal design of the piston housing and the filling knob will be different.

In fact this approach is technically even better since one would use the latest telescopic design version MB used, which is much more maintenance friendly !

Only - IMHO small - drawback being originality : this design was never used on 13X pens……

Francis

[christof]

Looks like hours of work....

 

...and hours of fun! Well done Francis!

 

C.

[Sarrelangue]

WOWWWW !!!

[Opooh]

Exquisite, Francis,

[wimg]

Very nice, Francis!

But then, I don't expect anything less from you .

Warm regards, Wim

[zaddick]

It's no Conid Bulkfiller, but I guess it will work as a pen.