I'll try to describe it. No crown, mural or other. The shield is quartered, and each quarter is filled with a different pattern either in white and blue, or in white and green. The coloured lines are quite thin, so the overall colour is mainly white. In the center, there is the municipal coat of arms of Aveiro, and the other municipal coats of arms of the district are distributed inside the quarters in four distinct patterns.
All coats are complete, with scroll and mural crown.
I'm sending to the list also the seal of the Viseu District. It features a red castle tower surronded by 24 stars, the number of municipalities in this district.