OM10 Is The First Fully Open-Source Mechanical Watch Movement

Mechanical watch movements are normally one of two things: proprietary designs locked up by the manufacturer, or reverse-engineered guesswork pieced together from forum threads and teardown photos. The Openmovement foundation’s OM10 is neither — it’s a movement designed from a blank sheet specifically to be given away.

What They Built

OM10 is a fully open-source mechanical watch movement running a Swiss pallet escapement at 3.5Hz, or 25,200 vibrations per hour — solidly in line with what you’d expect from a mainstream automatic or hand-wound caliber. It’s built around modularity and serviceability rather than maximum thinness or jewel count, which fits its intended audience: people learning to work on movements, not just admire them.

How They Did It

The foundation released complete STEP files covering the entire movement, available to anyone who creates a free account to download them. That’s a meaningfully different posture than most watchmaking IP, which tends to stay locked inside Swiss manufacture walls even when a movement is decades old. Releasing manufacturable CAD data — not just photos or a parts list — means a school, a hobbyist machinist, or another open-hardware project can actually produce or modify the thing, not just look at it.

Why It’s Worth Your Time

A from-scratch open mechanical movement is rare enough that it’s worth flagging on its own, independent of any specific watch built around it — this is infrastructure for the next generation of DIY mechanical watch projects, not a one-off build.

Go See It

Read more about OM10 via Hackaday’s coverage of the Openmovement foundation’s release.