Soprod Newton

	Brand:	Soprod
	Family:	Soprod Newton Family
	Height:	4.60 mm
	Jewels:	23
	Reserve:	44 hours
	Frequency:	28,800 A/h
	Winding:	Automatic
	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
Balance Bridge Screw Regulator Balance at 6:00
Production: 2020 – Current
1910s	1920s	1930s	1940s	1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s

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:

1. “Sophisticated” – Plus or minus 7 seconds per day, adjusted in 3 positions
2. “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.