|Diameter:||25.60 mm (11.5 ligne)|
|Complications:||Date, Hacking Seconds, Quick Date Correction, Semi-Instantaneous Date Change|
|Hands:||Central Hour Hand, Central Minute Hand, Central Seconds Hand, Date Window at 3:00|
|Distinguishing Technical Characteristics|
|Production: 2020 – Current|
Introduced in 2020, the Soprod “Newton” is an inexpensive Swiss movement designed for mass production. It is a modern movement and does not appear to be related to the earlier Soprod A10 family, which was based on a Seiko design. Key elements include a full balance bridge supporting the exposed balance at 6:00, suggesting that an open heart version is also in the works.
The Newton movement measures 11.5 ligne (25.60 mm) in diameter and is not especially thin, even for a central-rotor automatic, at 4.60 mm. It includes a date-only calendar with semi-instantaneous changes and quick adjustment using the crown, a stop-seconds device, and fast 28,800 A/h (4 Hz) operation. It has 23 jewels and is rated for 44 hours power reserve.
The Newton by Soprod is offered in two quality versions:
- “Sophisticated” – Plus or minus 7 seconds per day, adjusted in 3 positions
- “Top-Flight” – Plus or minus 4 seconds per day, adjusted in 5 positions
Each movement is tested by Dubois Laboratory and earns a “Chronofiable Certificate” after a number of tests.
The initial Soprod Newton movement, identified as “P092” on the plate, is presumably the first in a family of related movements from Soprod.
Soprod’s previous offering was an ultra-thin automatic based on the Seiko 4L25 design. Introduced in 2004, the Alternance 10 (later called A10 or M100) was a high-end movement with advanced features and a radically different design more competitive with the ETA 2892A2. In contrast, the Newton is thicker and more plain in design. Notable differences, apart from the use of a full balance bridge, include the location of most components below plates and bridges on the top and a single-screw rotor with five ball bearings (unlike the triple-screw, 7-ball A10). This places it in competition with the common ETA 2824-2 (and similar Sellita SW200-1) in mainstream watches. But the Newton is quite different in design from this movement as well, with a smaller balance on the opposite side and the bridge.Images are taken from official publications and are used here for commentary and educational purposes. Copyright is held by the original owner as noted.