Petula sang this song as part of a hits medley in Denmark in 1960 so it must have made an impact there ..just added alternative label design pressing .probably the red label was the first pressing
I think the Petula site tends to just copy dates from one country (where known) to another. When a release had different international pressings, they group them together, but the dates with month of release only apply to the UK 78s. I supplied them with those. The year of release for many others is often a guess, so I would think it likely this record was released in early 1951. Maybe original release catalogues haven’t survived from other countries to help date the 78s more accurately.
A friend helped me to look up the earliest references to this record (Petula Clark's "Silver Dollar") in Danish newspapers, and it turns out that the earliest one is from February 1951 (in BT), but most are from April 18-24, 1951: