ref.6378 and ref.6378Q


    I see a lot of ref.6378 , with a calendar window or without it.

    but ref.6378Q also with a calendar window . it makes me confused.

    i see it Q as in Quantième = date in French .  This rule can be resolved ref.6394 and ref.6394Q.

    i donot know whether it can be resolved ref.6378 and ref.6378Q. 

    i donot know whether ref. 6378 used cal.1071 without calendar window  and at same time ref. 6378 used cal.1072 with a calendar window .

    can you tell me the answer?  


    i saw a version ref. 6378  with linen-textured bezel and polished lugs.     and  ref.6378Q linen-textured bezel and concave lugs ( from antiquorum) .

   which one is Original, not be polished ?



     can you give me your answer ? thank you.

Re: ref.6378 and ref.6378Q
09/28/2016 - 01:40
it looks from the picture that the case of the top one has been polished!
09/28/2016 - 09:17


thank you
09/28/2016 - 09:51

can you give me the answer about my first question 

cal 1071, without date and cal 1072, with date
09/28/2016 - 13:17
my english is very poor
09/28/2016 - 15:33

maybe Dan could understand my question.

1、 i know ref. 6394 only used cal. 1071 without date ,  ref.6394Q only used cal.1072 with date .

       Q means date version.

2、ref.6378 used cal.1071 or cal.1072 ,   without date or  with date. (I made reference to the auction records of Antiquorum)

      ref.6378Q only used cal.1072 ,  with date.


what is the difference between ref.6378 and ref.6378Q  ?     why ref.6378 have a date version? 



the only difference between the two is the addition of date, the reference number
09/28/2016 - 15:47

refers to the case shape so therefore you have the same watch/case but with two possibilities: with date or without date

I can never be 100% sure, but I've gotten pretty good at understanding
09/28/2016 - 21:03

unclear English thanks to decades of training and experience with my parents (which I do love dearly). :-)

As we have discussed online and offline before, for every not be surprised if you see an exception.   In this particular case, "Q" stands for Quantieme (date).

So all Ref. 6394Q should have a date.  And that is what you say you have seen.

Ref. 6394 may or may not have a date, and you have observed both.  Vintage Ref. #s refers to the case design, so whether it has a date or not does have a does not affect the case design.  Would it be easier for collectors if all dates had a "Q" designation?  Sure, but it is also not that big a deal.  (On the other hand, if a "Q" showed up on a watch without a date function...I would be more suspect).

In general, 1071 has no date and 1072 has a date.  But to learn and love VC, you need to spend a lot of time to understand how things change and transition over time.  Please see this link:

There were 1071 that were simply renamed 1072 without dates, so there are 1072 movements without dates.


thank you.
09/29/2016 - 07:50

i think ref.6378  and ref.6378Q have the same case shape .  is it right ?

09/29/2016 - 11:18
i should spend more time to read and learn the old posts.
09/30/2016 - 15:20

the old discussion answer my question ,but  i never  read it carefully .

But a lot of content I still do not understand.    From the seventh picture ,like these:

1、4785    18k yg    35mm    466 17j   handwind   1952   # 265 AVC

      #265AVC ?   what does it mean for ? 

2、6378  18k wg             1965        #4  QMVC

      # 4 QMVC?   what does it mean for ? 

3、6378  18k pg              1965       #10(black dial)#11(siliver dial,1962) QMVC

      #10(black dial)#11(siliver dial,1962) QMVC?   what does it mean for ? 

4、6394   18k yg             1966       #21#27(k1072,1964)QMVC

        #21#27(k1072,1964)QMVC ?

  can you tell me the  meaning of these combinations?       thank you.

Your link takes people to the overall Discussions page
09/30/2016 - 16:04

I don't think that is your intent.  I think you are looking at a huge list that Tick-Talk put together several years ago,  creating a database of VCs sold at auction.

I'm not sure if you mean you do not understand his notes, please notice that Dean's work also included footnotes describing the initials he used.

1、4785    18k yg    35mm    466 17j   handwind   1952   # 265 AVC

      #265AVC ?   what does it mean for ? Lot #265, Antiquorum Vacheron Constantin catalog

2、6378  18k wg             1965        #4  QMVC

      # 4 QMVC?   what does it mean for ?  Lot #4, Quarter Millenial Vacheron Constantin catalog.

3、6378  18k pg              1965       #10(black dial)#11(siliver dial,1962) QMVC

      #10(black dial)#11(siliver dial,1962) QMVC?   what does it mean for ?  Lot #10, Lot #11, Quarter Millenial Vacheron Constantin catalog.

4、6394   18k yg             1966       #21#27(k1072,1964)QMVC

        #21#27(k1072,1964)QMVC ? Lot #21 Lot #27, Quarter Millenial Vacheron Constantin catalog.

here is the link
10/01/2016 - 00:16

i have a mistake  . here is the link.

I realized that it was a very serious mistake. Studying article, only to see the value  part of  i think it. This will be misunderstanding of the author's meaning. 

I also see a set of data, and come to the questions

movement production dates

1905        287000

1910        330000

1915        360000

1920        390000

1925        398000

1930        405000

1935        427000

1940        450000

1945        475000

1950        500000

   the production quantity of VC movement  is regular,the average annual number about  5000 - 6000

    but the specific period will be significantly  increased or reduced.

1905——1910   This period ,production increased significantly, maybe related to the development of the VC market in the Americas?

1920——1925   This period ,production  reduced significantly,  only  8000 in 5 years, After World War I, the world economy is recovering, why is  the number of production be reduced?

1925——1930   This period ,production  reduced significantly,  only  7000 in 5 years, I infer that the economic crisis led to a market slump.

1935——1945   In World War II, there was no significant reduction in output. i think it  related  the demand for military .