Sellita · Automatic caliber guide
One name. Different executions.
The SW200-1 combines a date with a 4 Hz beat rate in a 4.60 mm movement. The name is only the beginning: the grade, finishing, and regulation specified by the watch brand help explain why two watches using it can make different timekeeping promises.
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Published figures, with the context that makes them useful.
Specification reference: Sellita — SW200-1 technical documentation (PDF). These are published specifications, not measurements from my own testing. All manufacturer sources ↓
My take
I would look for a clearly stated grade and accuracy commitment before paying more for a watch on the strength of its SW200-1. The movement is one part of the decision; case proportions, service arrangements, and the rest of the watch still deserve just as much attention.
Beyond the spec sheet
Sellita’s current technical guide lists Elaboré, Top, and Chronomètre executions. The finished watch may be regulated to a brand-specific tolerance. For example, Circula lists −5/+7 seconds per day for the AquaSport II’s Elaboré movement; that is a Circula specification, not a promise for every SW200-1. [source]
“38 hours” and “41 hours” can both describe this movement correctly: Sellita gives a minimum of 38 and a typical value of 41. Neither number measures how much energy is left after a particular day of wear. [source]
Hand winding and hacking are provided, but crown construction and date-setting instructions belong to the watch you own. Use its manual to identify the winding position and the period when quicksetting the date should be avoided.
Compare the tradeoffs
Useful comparisons for choosing a watch. These are not claims of parts compatibility.
The movement, in a watch
A selected starting list, grouped by brand. Each exact model below has a manufacturer source confirming the caliber.
Links marked “affiliate” may earn me a commission at no extra cost to you. Editorial priorities come first; affiliate availability only breaks ties. It does not change my review ratings.
Reference AE-ST-BB-SB-A
This blue-dial reference specifies SW200-1 Elaboré and −5/+7 seconds per day. Newer Power+ versions use a different caliber.
Reference CO3HBK
The current 1956 3H Black page specifies SW200-1 Elaboré and 41 hours. The GMT and chronograph are different calibers.
Model and caliber checked October 14, 2026. Specifications and stock can change; confirm the exact reference with the seller. A manufacturer-verified example is not a hands-on review.
Quick answers
There is no single figure that safely describes every SW200-1 watch. Check the execution or grade and the watchmaker’s published tolerance. A chronometer claim also needs the relevant certification; the SW200-1 name alone does not provide it.
Sellita’s SW200-1 document specifies at least 38 hours and a typical 41 hours. The 65-hour figure belongs to the separately named SW200-2 power+. Always check the exact caliber and the watch’s production version.
Frequency describes the oscillator’s rate. It is not an accuracy guarantee. The eight-beat sweep looks finer than a six-beat sweep, but the finished watch’s regulation and timekeeping specification are what matter when assessing accuracy.
Check the details
Movement specifications checked . Watch-specific evidence is linked with each example above. I keep manufacturer claims separate from my editorial assessment and any hands-on review.