I posted similar message to Italian it.arti.fotografia newsgroup.
I've got an advise to find an old military guy so far. Could you
provide me with a name of the magazine that you mentioned? I could
looks for a copy in a local store and see if there is an ads section..

 Germany should definetely have something but I am a bit affraid that
their repair costs are significally higher than american service
prices - I was looking for spare parts for my Rollei SL66 some time
ago (such as a missing film back slide) and, in the first place, I
tryed to communicate German Rollei repair shops. Their prices 60-70%
exceeded top of eBay (say, 32 euro for a brand new 19euro square
leaf).

 That's what I am trying to convince me in. I don't really like an
idea of being "lucky" to pick up another shutter cheap that would
later jam and might not be adjusted. Better to have one that surely
works.

Thanks,
Serge

If it were my shutter, I'd try the "Ronsinol Repair" first: $1.25

Possible.  Supermatics are very long lived.  I have lousy luck with
Compurs - almost always gummed up and impossible to repair without
something going sproing and getting lost or snapping in two.

A shutter with a control for opening the shutter for focusing such
as Copal are, IMO, far preferable to the compur/prontor/seiko
'press' shutters.

rec.photo.marketplace.large-format

ebay & a whole lot of luck: don't expect to get a good one cheap,
and don't expect it works just because it is expensive.

Any of a dozen or so dealers in the US.

Local camera swap meetings/flea markets.

Search with Google.

Most any.  For a normal lens a '0' or '1' size.  Measure the hole
that your present shutter goes into.

Variable.  The general answer is not with out shimming and sometimes
a thread adapter is needed.

Find a Polaroid 110a/b.  Rip the lens and shutter out of that and use it
on the Graflex.

Regards,

Marv

A few seconds of web search reveals it to be a wide-field-Ektar design.

And, it says wide angle right there in the name: "Weitwinkle" is
"wide angle" in German (literally "far bend").

Yup, if the problem is grit or sand then a solvent soak will just make
the performance (what there is of it) worse.  OTOH, it won't break the
shutter.

Some shutters use paper blades, and if this is the case then I second
Tom's advice to _not_ soak.  

Otherwise my advice is to soak, if it doesn't work then it wasn't gummed oil,
and it  will have to be taken apart: spend a $150 or so on a rebuild or get
another shutter.  A re-build is a sure bet, another shutter has a high
probability of landing you just another gummed up shutter.

The chances of getting a shutter working with a soak (90% success) are
far higher than do-it-yourself disassembly (1%) unless you are
well versed at taking watches and clocks apart and putting them
back together again in fine working order (back to 90%).

Fishboard, a very stiff black or brown cardboard used for insulation, will
survive solvent and oil: it is often used in oil impregnated
transformers.

Very few folks have the factory manuals, without which the chances of
putting it back together again are close to zip.  Video recording the
take apart stage has been recommended by some.  And if a part goes sproing
across the room then one is SOL.

Prontors are all metal - I have a pile'o'parts to prove it -
so the paper problem isn't.  In my experience the problem, if it
'worked once', is old grease or oil.  50 years ago oil didn't last
for 50 years without turning into dried up oil-based paint: All old
shutters are gummed up (unless there is solid evidence otherwise),
and some may have sand in them for extra added aggravation.

I can not recommend do it yourself shutter disassembly unless you are
versed in this sort of thing (or don't mind chucking a half dozen
shutters in learning it).  The chances of success for most everyone
are miniscule, and those that can attempt it with success don't ask
... they just do.

As always, advice worth price charged.

Tom <tom@localhost> wrote:

 It's a late Special Top-Rangefinder 4x5 model. The lens is a
wide-angle.

 Thanks, I didn't really intend to do it at the moment. I am trying
to discover possiblities to have it surely fixed and, if that would be
possible, to check that it works more or less properly at all speeds.
I am affraid to stick with a queue of issues that not serviced shutter
may give.

Serge

 Well, I've just collected information from an italian usenet group
and after questioning some local stores. As the result, I've been
given coordinates of a person whose repair shop is luckily located not
far from me. I don't believe he is the only one in Italy but I didn't
dig out any other address at the moment.
 I just gave him a call to find out that he could try to open and
repair the shutter but wouldn't be able to replace or remanufacture
any part of it in case if something is broken/missing. Apart from the
cost of repair he would charge 150 euro (over $180) extra for a
typical CLA.
 SKGrimes is still beating this price, together with delivering
expences and considering that they'll repair it but not merely will
try to.

Serge