Nice looking ship Hugo. Looks a bit Dutch as well as Finnish. That AA layout on the aft bridge definitely screams 'Dutch'. I would say that you could do with a pair of 40mm somewhere round the main bridge structure to give it some light AA coverage.
Thanks. A pair of lighter AA guns flanking the bridge would doubtlessly appear in a modernisation around the turn of the 30's.
In regards to the aft AA bridge; indeed, some inspiration came from the Dutch
de Ruyter. With that said, a lot of Swedish CDS:s rocked AA bridges as well, which I believe is one of the reasons for their rather common occurence in my drawings.