|Reserve:||42, 56 hours|
|Winding:||Automatic, Central Rotor Automatic Winding|
|Diameter:||25.60 mm (11.5 ligne)|
|© Sellita Cal. SW300 is a clone of the thin ETA 2892A2||Complications:||Date, Hacking Seconds, Quick Date Correction|
|Hands:||Central Hour Hand, Central Minute Hand, Date Window at 3:00, Small Seconds Hand at 6:00|
|Distinguishing Technical Characteristics|
Clockwise Balance Cock
|Production: 2014 – Current|
Cal. SW360-1 is an automatic movement with small seconds similar to the ETA 2895-2. It is a version of Cal. SW300-1, itself a clone of the popular ETA 2892A2.
Sellita SW360 History
Sellita had long produced movements for ETA, and re-sold assembled kits of Cal. 2892-2 and 2893-2 as late as 2008 with ETA branding. The company also specialized in custom finishing of these movements for many Swiss watchmakers. In 2008, Sellita switched to their own-brand SW300 movement family, though most of the components remained identical. The assortment was still sourced from Swatch Group’s Nivarox but the remaining components were transitioned to other suppliers.
Like the SW200 family, Cal. SW300 was updated shortly after introduction with new more durable tooth profiles as well as updated bridges for the reverser wheels. Movements with this update are denoted with the “-1” model number, and non “dash-1” movements are rarely seen. By 2013, Sellita developed a new pallet bridge for the SW300 movements, eliminating a screw and threading of a positioning hole. These components are interchangeable and do not change the movement name.
The second member of the SW300 family is this unusual small seconds movement. Cal. SW360-1 is a clone of ETA’s Cal. 2895-2, a rarely-seen automatic movement with date and small seconds. Although internal documents are dated 2014, the first public mentions of SW360-1 come two years later. In 2021, a new barrel and mainspring increased power reserve from 42 to 56 hours.
Sellita SW360 Applications
Cal. SW360-1 is used by TAG Heuer as their Calibre 6.
Sellita SW300 Family
The SW300 family consists of just three movement models with three simple complications: Date wheel, 24 hour hand, and small seconds. These movements are widely used, however, especially Cal. SW300-1, now that ETA has restricted sales of the similar Cal. 2892A2.
Note that Sellita SW300 movements have four more jewels than their ETA 2892-based counterparts. In 2021, Sellita began fitting all SW300 family movements with a new barrel with longer power reserve of 56 hours rather than the 42 previously specified.
|ETA 2893-2||25||Date and 24 Hour Hand|
|SW360-1||ETA 2895-2||31||Date and Small Seconds|