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WORLDWIDE Chapter 149 Message Board Forum Index » English watch discussions » 1815 Barrauds Duplex Goto page Previous  1, 2, 3  Next
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PostPosted: Tue Apr 28, 2020 5:03 pm Reply with quote
omexa reborn
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Joined: 13 Apr 2011
Posts: 511
Location: Darwin, Australia




Hi Jon, a poor old Divorcee's finances do not run to that expense. I will see if I can download them from some University somewhere. Regards Ray

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PostPosted: Tue Apr 28, 2020 5:09 pm Reply with quote
Jon
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Joined: 02 Dec 2002
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Location: Boston, Ma




Yours and your English friends mov'ts are refered to as the "Barraud caliper" ending in the 8000s, as per Jagger

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PostPosted: Tue Apr 28, 2020 5:14 pm Reply with quote
Jon
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I just searched the value of the Jagger reference--wow, have these gone up?

This must now be a hot series to collect!

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Jon "the truth" Hanson
Founder and President of Chapter 149--the leading horological collectors' club!
American Horologe Co -- America's Most Respected Name
SUPPORT ETHICAL PRACTICES IN HOROLOGY--Keep watches original--DO NOT SWITCH, PART OUT OR "CREATE" PW abortions!
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PostPosted: Tue Apr 28, 2020 5:17 pm Reply with quote
omexa reborn
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Location: Darwin, Australia




Hi Jon, I just found the Jagger book at a price I can afford.

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PostPosted: Tue Apr 28, 2020 5:19 pm Reply with quote
Jon
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It pays to hunt!

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Jon "the truth" Hanson
Founder and President of Chapter 149--the leading horological collectors' club!
American Horologe Co -- America's Most Respected Name
SUPPORT ETHICAL PRACTICES IN HOROLOGY--Keep watches original--DO NOT SWITCH, PART OUT OR "CREATE" PW abortions!
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PostPosted: Tue Apr 28, 2020 5:35 pm Reply with quote
PJR
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omexa reborn wrote:
Hi Paul, I have asked my friend who is one of the best Watchmakers in the UK how the Ruby was drilled and cut; I do know, but I would like to get a more accurate description from him; he does not want his name mentioned as he has too much work as it is. How about a post about the Pennington ruby duplex?


I’ll post it with lots of pics tomorrow. I did a partial post earlier.
Paul
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PostPosted: Wed Apr 29, 2020 8:36 am Reply with quote
omexa reborn
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Joined: 13 Apr 2011
Posts: 511
Location: Darwin, Australia




Hi, I had a reply from my Watchmaker friend: "Hi Ray,

The hole was drilled using a tiny splinter of diamond, ('bort'), cemented into the end of a brass rod, before being polished with copper pins and rotating laps charged with diamond dust. The slit was made with a thin copper or iron disc, (a 'skive'), again charged with diamond dust. Jewelling specialists made their own diamond fragments and dust by crushing low-grade 'industrial' diamonds in a heavy steel mortar and then settling out the various sizes of fragments and particles in olive oil. This all required very high levels of skill and patience.

This was all long before the advent of synthetic ruby.

Regards, xxxx".

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PostPosted: Wed Apr 29, 2020 12:39 pm Reply with quote
PJR
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Hi Ray, I had posted several pictures of the Pennington under the “English Watch Discussion “ category. Let me know if you want more pictures.
Paul.
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PostPosted: Wed Apr 29, 2020 12:44 pm Reply with quote
omexa reborn
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Location: Darwin, Australia




OK will do. Regards Ray

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PostPosted: Wed Apr 29, 2020 1:16 pm Reply with quote
Jon
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omexa reborn wrote:
Hi, I had a reply from my Watchmaker friend: "Hi Ray,

The hole was drilled using a tiny splinter of diamond, ('bort'), cemented into the end of a brass rod, before being polished with copper pins and rotating laps charged with diamond dust. The slit was made with a thin copper or iron disc, (a 'skive'), again charged with diamond dust. Jewelling specialists made their own diamond fragments and dust by crushing low-grade 'industrial' diamonds in a heavy steel mortar and then settling out the various sizes of fragments and particles in olive oil. This all required very high levels of skill and patience.

This was all long before the advent of synthetic ruby.

Regards, xxxx".


"Patience" for sure!

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Jon "the truth" Hanson
Founder and President of Chapter 149--the leading horological collectors' club!
American Horologe Co -- America's Most Respected Name
SUPPORT ETHICAL PRACTICES IN HOROLOGY--Keep watches original--DO NOT SWITCH, PART OUT OR "CREATE" PW abortions!
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PostPosted: Wed Apr 29, 2020 1:52 pm Reply with quote
Jon
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Location: Boston, Ma




Paul, no photos as yet???

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Jon "the truth" Hanson
Founder and President of Chapter 149--the leading horological collectors' club!
American Horologe Co -- America's Most Respected Name
SUPPORT ETHICAL PRACTICES IN HOROLOGY--Keep watches original--DO NOT SWITCH, PART OUT OR "CREATE" PW abortions!
View user's profile Send private message Visit poster's website
PostPosted: Wed Apr 29, 2020 3:02 pm Reply with quote
PJR
Chapter Member
Joined: 01 Dec 2008
Posts: 2465




It is featured 35 entries down in English Watch Discussions.
Paul
Can provide more pics if desired.
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PostPosted: Wed Apr 29, 2020 3:48 pm Reply with quote
Neilywatch
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Joined: 16 Oct 2010
Posts: 5638




Ray -

These ruby duplexes can be cut by laser. Problem today would be the set up time - it all has to be entered on computer by someone who knows code AND watches, a rare combination indeed!

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Neil - Crazy for Walthams!
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PostPosted: Wed Apr 29, 2020 4:13 pm Reply with quote
omexa reborn
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Joined: 13 Apr 2011
Posts: 511
Location: Darwin, Australia




Hi Neil, I realize it is possible but as you say not an economic situation. Regards Ray

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PostPosted: Wed Apr 29, 2020 5:19 pm Reply with quote
Jon
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Posts: 26949
Location: Boston, Ma




Got, it Paul; I now remember the watch and that adjustment. Thanks.

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Jon "the truth" Hanson
Founder and President of Chapter 149--the leading horological collectors' club!
American Horologe Co -- America's Most Respected Name
SUPPORT ETHICAL PRACTICES IN HOROLOGY--Keep watches original--DO NOT SWITCH, PART OUT OR "CREATE" PW abortions!
View user's profile Send private message Visit poster's website
1815 Barrauds Duplex
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