Dutch citations of ijsco

Unclear whether this is a proper noun or a common noun.

  • 1918 May 4, "Sociale Kritieken van 'n Schooier" part 2, Bredasche courant, vol. 128, issue 102, page 2.
    IJs! IJsco, drie en vijf cent! Tjing.
    (please add an English translation of this quotation)