The 13.33 by Longines was first produced around 1913 and was the only Longines chronograph wristwatch movement until
the early Thirties when it was replaced by the better known 13zn. It was only ever used by Longines and was produced totally in-house.
From all the ones I've seen they are all finished to this spec, which is pretty amazing for a watch born at the start of wristwatch production.