Eterna cal. 600 - 28mm

Here again an ETERNA - unfortunately a small one, which measures only 28mm. Cal. 600, 10.5''', 23.3mm. Unfortunately not the variant with gold lever and -escapement wheel, but one with a Glycidur balance, which is not mentioned in RANFFT´s movement archive. The watch is beautifully preserved for my taste and the dial looks almost magical: sometimes it is midnight black, sometimes iridescent gray. Unfortunately hard to photograph.
According to the engraving on the caseback, it was given to someone as a present at the end of his/her apprenticeship in 1944; perhaps to a woman?

P.S.: I should have written that this is the movement with Glycidur balance, but it has no gold lever and no gold escape wheel.