I have an Arts et Metier "Photographie" annual from 1936. There is an index listing photographer, hometown, subject and occasionally info about camera, exposure etc.
There is a gravure in there which is in the index as "X.....". No photographer, subject...nothing.
I may be going nuts, but I'm convinced that it is a portrait of Tina Modotti by Edward Weston.
I've attached a jpg, can someone put me out of my misery?