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1949 Development of the Controlling System of Wrist Watch 1949 Swiss Magazine Article Horology
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"The Development of the controlling system, the wrist watch" by Pierre Beguin, and "In the Workshop: Jewel Holes and other Bearings: by H. Jendritzki - two original magazine articles (magazine clippings) which were removed from a 1949 Swiss magazine. Text in the articles is in English.
The articles include technical information which may be of interest to the watch repairer / horologist.
[Please note: these are magazine articles/magazine clippings only; no watch, clock, parts or tools are included.]
The magazine articles were carefully removed from a Swiss magazine.
Starting with the article titled "The development of the controlling system, the wrist watch," the article opens with the following:
"Some interesting properties of metals and alloys which may be used for the manufacture of balances and springs remained for a long time unsuspected. Those properties which have a bearing on the question of isochronism are of extreme importance in horology. The time of oscillation is affected by a number of factors, some tending to cause an increase, in other words tending to make the watch lose, while others produce the opposite effect."
The article is approximately 7 pages in length (on 4 sheets of paper) and includes a number of diagrams within the text.
The second article, titled "Jewel Holes and other Bearings," opens with the following:
"The jewel holes serve to locate the various moving parts of a watch, and the pivots must work in them without excessive clearance, otherwise the relative positions of these parts may be altered to such an extent as to affect their correct functioning."
The article is 9 pages in length (on 5 sheets of paper) and includes several small black and white images and diagrams within the text. The opening page of this article falls on the reverse side of the last page of the previous article; therefore the two articles may not be separated.
The two articles combined are approximately 16 pages in length (on 8 sheets of paper). They include technical information which may be of interest to the watch repairer / horologist.
As with most vintage magazine clippings, there is some yellowing to the paper due to age as well as light wear and small bends.
The magazine articles were carefully removed directly from a Swiss magazine. They are not a copy or reproduction. The rest of the magazine is not included.
[Please note: these are magazine articles/magazine clippings only; no watch, clock, parts or tools are included.]
[inv. EngE-ND-11/12-49]
The articles include technical information which may be of interest to the watch repairer / horologist.
[Please note: these are magazine articles/magazine clippings only; no watch, clock, parts or tools are included.]
The magazine articles were carefully removed from a Swiss magazine.
Starting with the article titled "The development of the controlling system, the wrist watch," the article opens with the following:
"Some interesting properties of metals and alloys which may be used for the manufacture of balances and springs remained for a long time unsuspected. Those properties which have a bearing on the question of isochronism are of extreme importance in horology. The time of oscillation is affected by a number of factors, some tending to cause an increase, in other words tending to make the watch lose, while others produce the opposite effect."
The article is approximately 7 pages in length (on 4 sheets of paper) and includes a number of diagrams within the text.
The second article, titled "Jewel Holes and other Bearings," opens with the following:
"The jewel holes serve to locate the various moving parts of a watch, and the pivots must work in them without excessive clearance, otherwise the relative positions of these parts may be altered to such an extent as to affect their correct functioning."
The article is 9 pages in length (on 5 sheets of paper) and includes several small black and white images and diagrams within the text. The opening page of this article falls on the reverse side of the last page of the previous article; therefore the two articles may not be separated.
The two articles combined are approximately 16 pages in length (on 8 sheets of paper). They include technical information which may be of interest to the watch repairer / horologist.
As with most vintage magazine clippings, there is some yellowing to the paper due to age as well as light wear and small bends.
The magazine articles were carefully removed directly from a Swiss magazine. They are not a copy or reproduction. The rest of the magazine is not included.
[Please note: these are magazine articles/magazine clippings only; no watch, clock, parts or tools are included.]
[inv. EngE-ND-11/12-49]
