I have noticed use of a long sideways action lever in many no name Swiss 1850? moderate grade p.w. Looks like it would be sluggish and frictional. Wonder why it was used? Maybe a ruggeder arrangement than the then current duplex and cylinder types in similar age fine watches. I guess the popular Massey lever was a better similar one? 2 photos of the lateral lever and of a later fine quality tiny lever low inertia, low drag one. Mainly interested in knowing if lateral? lever had any advantages. I have good examples of detent, duplex, cylinder as well. All work fine.