Here are a few comprisons of 30mm movements:
By: SteveG : June 9th, 2011-15:52
Cal. 269 at left, 30T2(SC)rg at right: just visually, polished winding wheels, polished and shaped teeth, polished and beveled screwheads, finer anglage deeper-cut teeth (require greater precision in setup), thinner and beveled wheels and spokes: Lots of ...