• 11 Apr 2020, 3:22 p.m.

    As some of you know, I am collecting pocketwatches, IWC only.

    Far from saying that my collection is a museum collection but I am proud to
    have found some nice and rare pieces over time.

    Some of the pocketwatches are common, easy to find on the market, sometimes in
    better condition than mine, but some I have are gems.

    So in these crazy times, as the museum in Schaffhausen is closed, why not open
    one here on the forum.

    As long as the museum is closed, I will post here daily a pocketwatch from my
    collection.

    I hope I don't run out of pieces before the virus is beaten. Fingers crossed
    for all of us.

    I will post them in a random order, with some comments, feel free to join.

    Keep safe all.

    DAY 21 :

    When you speak of slim and elegant, my thoughts are going directly here to
    Ralph Ehrismann, an esteemed member of this forum.

    Slim and elegant as in slim and elegant of the caliber 77 pocketwatches.
    Because if there is one member that can call himself Mister 77, it is Ralph.

    Every weekend in this series, I am trying to post an extra special IWC
    pocketwatch and this weekend, all will be around the number 7.

    So today a cal 77, on of the nicest IWC pocketwatches, plenty of jewels and
    most of the time in very nice gold cases.

    The cal 77 was not build for a very long time in history, only between 1917
    and 1921. 10500 calibers were made and most of them were shipped to the US,
    where they were encased is cases called Cres-Arrow by Whiteside&Blank in
    Newark, New Jersey.

    The sign of cresarrow inside the cases is a C with an arrow going through. I
    have 2 of these Ca77 with Cresarrow case that I will show later.

    Today is a more special one for collectors, allthough the case is the less
    special one of the three, it is a watch that was put in a case in Schaffhausen
    and so carries the stamp Probus Scafusia in it.

    Where the caliber numbers of my caliber 77 go between 726xxx and 751xxx, the
    case of my Schaffhauser cal 77 has a number far away from the 700 thousands,
    it has the case number 940XXX. So these calibers were put on a later date in
    the cases in Schaffhausen after been made years earlier.

    I found that the experts think something like 600 watches with a cal 77 have a
    case that left the IWC factory.

    My cal is from 1920, the case number is dated more around 1935, case is 18K
    gold.

    The one shown today has 21 jewels. The cal 77 came also in 15 jewels, 17 and
    19. There are interesting discussions on the forum regarding a 23 jewels cal
    77. You can find it here :

    forum.iwc.com/t/c77-23jewels/13632/#post-8274

    Not surprised the man in the lead there is Ralph.

    Here is mine, but I know there are people on the forum with nice cal 77
    watches too, sometimes with great stories.

    Enjoy reading.

    what a gift for a loyal person

    with the Probus stamp

    like some of these rappers, 21 jewels and missing a screw ;)

  • Master
    11 Apr 2020, 3:23 p.m.

    Indeed Tonny, it does not get much better than this! That's a trully handsome
    timepiece.

    I too have a number of C.77 based timepieces in my collection and indeed it's
    hard to mention or write anything around this calibre without refering to
    Ralph Watch77. He too played a vital part in my Cal. 77 collection story. A
    part of this story can be found here

    A Tale of Dizygotic Twins

    where the Cresarrow Story can be found back. Here below, the Cresarrow symbol
    from inside one of my Cal. 77 watches.

    The watch I want to share with the forum today to compliment Tonny's watch is
    as elegant and slim as his IWC cased C.77

    The Watch

    This Cresarrow cased C.77 was sold on the 14th of May 1920 to the one and same
    Mr. Henry Blank (as in the Dizygotic Twins Tale) as a bare movement. All
    engravings on the movement, being International Watch Co. - 19 Jewels, 6
    Adjustments
    , were realised in Schaffhausen.

    As can be seen, the 18k gold case is finely adorned with enamel inlay.

    The case back is elegant to, in it's clear lines. No engraving.

    The case edge is hand engraved

    The Calibre 77 movement absolutely wonderful to look at

    This magnificent pocket watch forms a part of the Dizygotic Twins tale and is
    covered in Part II of that story.

    Tomorrow, more on that.

  • Master
    11 Apr 2020, 7:50 p.m.

    A masterpiece in the hands of a master saga teller.

    How little do we know about the history of nearly all vintage IWC pocket
    watches.and their owners.

    Until they come in the hands of Mark Levinsohn.......

    Adrian,

    (alwaysiwc)..

  • Master
    11 Apr 2020, 11:17 p.m.

    I love the c.77 it is my favorit IWC movement. I think it is, but this is not
    fully proven, the plate and bridges of this movement are not made of brass but
    have nickel alloy plate and bridges. The other "new" pocket watch have brass
    "bodies". An other funny thing is, in the production series books there 2
    series (600 pieces) with indicated with "23 jewels". Even in the production
    indication there is the time and the production steps for the 2 additional
    jewels (barillet & couronne). But this series do not have this additional
    jewels but ar marked with "PRECISION QUALITY" (see picture below)

    Regards

    watch77

  • Master
    12 Apr 2020, 1:52 p.m.

    Ralph, you write ".. not made of brass but have nickel alloy plated bridges".
    (typo in your post).

    By this you mean the finishing on the plates and bridges, right? Meaning, that
    the bridges are made of brass but finished in high quality nickel alloy
    plating?

    I was not aware of the 23 jewels / Precision Quality saga - so now I need to
    find one of those too!

  • Master
    12 Apr 2020, 6:02 p.m.

    A long time ago, I was told the full body of the cal 77 where made out of an
    nickle alloy (Neusilber). I starting more then once the trial to proove it.
    But every time I wanted to cut into two pieces a c.77 movement, my heart told
    me: "No you can't do that !"

    The there is no proove for it an probaly just an rumor. From the production
    there is no reason to make one movement in "Neusilber" instead of brass.

    But the production prescription for the 23 jewels is given. I had once, 15
    years ago, the chance to visit the archives and to see the book with the
    production prescriptions for the c.77 (must have been defined around 1920).

    regards Watch77

    P.S. An I still seeking for a Ref 5310....

  • Apprentice
    11 Mar 2021, 6:15 p.m.

    Here's another example of a cal 77 21J:

  • Master
    11 Mar 2021, 7:46 p.m.

    Magnificent- can we see a picture of the dial side too please. Is the case an
    IWC case (or Cresarrow case as most are)?

  • Apprentice
    12 Mar 2021, 8:30 p.m.

    Thank you, Mark.
    ( Mr. Berteloot provided this link with all these lovely photos and a ton of
    information... )
    Here's the whole deal from the worn down dial through the mainplate, inner
    case and caseback:

  • Master
    12 Mar 2021, 8:32 p.m.

    Absolutely stunning movement. Love these projects.

    Thanks for sharing

  • Apprentice
    2 Dec 2024, 6 p.m.

    Dear Sir I need your help to understand this watch

  • Apprentice
    2 Dec 2024, 6:01 p.m.

  • 2 Dec 2024, 6:57 p.m.

    You have a nice cal 73 from 1927.

    The case is typical for that era, the word "chronometre" was more a commercial thing to put on the dial than a real reference to chronometer specs.

  • Master
    2 Dec 2024, 7:17 p.m.

    Tonny is spot on.

    only thing to add, is that the movement looks to be in good condition.