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Watch Movement - Manual - Hunter 10 1/2 18J Chrono

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Watch Movement - Manual - Hunter 10 1/2 18J Chrono

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Name Hunter 10 1/2 18J Chrono
Manufacturer Aegler (Details)
Type Manual
Jewel Count 18
Year(s) of Production 1950 - 1960
Chronometer Yes
Hacking No
Date No
Hand Winding Yes
Quickset No



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History: The Hunter series of movements was introduced in 1923 and designed to replace the earlier Rebberg series. In 1935 Rolex complemented the design with the "Superbalance" component (for which they obtained a patent). The 10½ Hunter was named as 10½ is the size in lignes (23.7mm) and “Hunter” being the layout of the watch design, meaning that the winding crown was at 3, as in a hunter pocket watch (one with a lid that closed over the dial), rather than at 12 as in an open-face pocket watch. Rolex and Aegler made continuous improvements to this line of movements from 1923 when it was introduced until 1969 when it was finally retired

This late version of the Hunter was augmented to pass chronometer certification. The augmentations took the Hunter movement of the 1950s from 17 to 18 jewels. Like all Hunters, this movement has no date function. This version has the second hand in a "sub" or subsidiary location below the main dial. Later versions of the movement are known as Calibre 700.

Info: The Aegler watchmaking company was established in Biel / Bienne in 1878 by Jean Aegler. Biel / Bienne is on the language boundary between the French and German speaking parts of Switzerland, hence the dual name for the town. Biel is German, Bienne its French counterpart.

Hermann Aegler made ebauches (unfinished movements) of a small size. After Rolex was founded they started importing Aegler’s movements and used them to make a variety of “wristlets,” selling them principally in the UK and in the British Empire, above all in Australia and New Zealand. His belief in the wristwatch format was confirmed by a precision test at Kew Observatory in London on 15 July 1914, when a 25-mm Rolex “wristlet” attained a Class A certificate, previously won only by much larger pocket watches.

Although Aegler was a completely separate legal entity than Rolex - it was owned by the Aegler and Borer families - starting in 1936, they only produced watches for Rolex and operated as a subsidiary of the Rolex brand. Eventually, in 2004, Rolex completed the legal acquisition of Aegler and Aegler became a de jure as well as de facto division of Rolex. For this reason, movements made by Aegler from 1936 on are considered "In-House" Rolex mechanisms as they were only available in Rolex products.


Item Links: We found: 1 different collections associated with Manual - Hunter 10 1/2 18J Chrono
Item created by: gdm on 2018-10-03 11:55:42. Last edited by gdm on 2018-10-15 13:13:52

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