Making Flat Springs

[DouglasSkinner]

I'm looking for advice on what kind of steel stock makes good flat springs for watches?  What do you recommend?  Where can you get it?  Thanks!

[nickelsilver]

If you're talking about something like a set bridge or springs and jumpers for a chronograph or similar the standard steel  in the U.S. would be O-1 oil hardening steel. Starrett sells it, you may find cheaper elsewhere.

Bergeon used to sell little packs of steel sheet in different thicknesses, you may find some old stock on Ebay. It seems quite similar to O1 in my experience. Other Swiss suppliers used to sell larger sheets in 0.10mm thickness increments but not anymore and it's quite tricky to find in small quantities.