What you have to understand is that your caliber may never be attributed to a specific maker.
In the era it was produced the Swiss watch industry was a fractionally integrated group of many manufacturers.
All the way from complete ebauche makers to specific parts producers. They operated in an almost incestuous relationship (i.e.: characterized by mutual relationships that are intimate and exclusive to the detriment of outsiders). Designs, ideas and components were shared for the percieved common benefit of parties involved in particular collaborations.
The producers (both large and small) of ebauches often followed the design influences of a leading house (meaning copied) and that's why so many calibers from that time bear similar layouts, usually with small changes to bridges, springs and levers so that the design was different enough to be considered "manufactured by XXXXXXX".
One of the key identifiers is the shape, style and layout of the setting parts (keyless works) on the main plate of the movement. This can only be seen by removing the hands and dial.
It may help to identify the movement, or it may not, such is the proliferation of similar calibers (hundreds of them) produced in the mid 20th century.
