Military Monday ~ Pineu Goldstein in Romania

I thank the volunteer Romanian translator at the JGSGB (Jewish Genealogy Society of Greater Boston) "Annual Help Day" for the following translation.

The message on the left is translated as:
    On the occasion I
    was photographed for the military
    I send you this
    photo of mine
    as a memento.
    [Your] brother,
       Pineu
       Goldstein
    Yassy [Romania] 15/3/928  [15 March 1928]

At right, it is addressed:
    Honorable Family
    Moise Goldstein
    New York
    America

Now, I can't imagine that this was mailed like this - there were at least a couple dozen Morris Goldsteins in New York at this time. I'm guessing that this labeled photo was then placed in an envelope and mailed to my husband's grandfather.

The name Pineu Goldstein is not familiar to my mother-in-law. All she knew of this photo is that this was the the youngest brother of her father, Morris Goldstein, who "remained in Romania and became a Communist." And where we thought that only the brothers who emigrated to America (Max and Morris) changed their surname to Goldstein from Yancu, it appears that at least one of the brothers who remained in Romania had the Goldstein surname.