Vintage Rolex Chronograph input appreciated

[Koolio]

Bezel and case seem correct. Different makers existed for Rolex 3330 case (as for 2508). The version with the thinner bezel was recently sold at antiquorum. The shockprotection seems weird though. Parts of the movement have probably been exchanged at some point in time (like eg the shockprotection). Valjoux 71 is not "very" common. A lot of parts from Valjoux 22 might fit. The Rolex 3330 case has a small channel which is lower than the lugs (stamped in the case so to say) in which the bezel has to fit. Different bezels are therefore not easily interchangeable as the distances have to match. Stampings on the caseback and inside seem correct. The Rolex word can ne seen in the crown if zoomed in, although it seems to be worn off a lot.