Signet Seal Ring in Salome-Platform

Here is a model of a signet seal ring.

1. Create two circles
2. Partition both circles and then scale the outer circle.
3. Create face and then partition it.
4. Extrude one face higher than the other.
5. Create two cylinders and use it to cut the bigger extrusion. The result will be a curved ring.
6. Fillet the edges to make the ring smoother. 
7. Design seal in DraftSight and import it to Salome.
8. Build face in the design and then extrude it to create a solid seal.
9. Place the seal on the ring and use partition to create a single body.
10. Scale the ring in meters.
11. Export in IGS.