@stibs If I remember correctly you had your hands on a case of these at some point, right? Any images saved?
@cosrob The seals look consistent with authentic boxes to me but perhaps someone with more Gym box experience can corroborate the details of these. This is a single country code box which means it’s also very likely to be quite a bit scarcer than the version with multiple country codes. Looking at the pictures closely, I believe the box was pictured while inside of a plastic case when PWCC photographed it.
Source: Masters Guide for Pokemon WOTC Corrected Errors & Test cards