Pagodas are one of the few architectural forms that became a decorative object in their own right. In metalwork the stacked-tier version is common: each storey cast separately with its own roof, then threaded onto a central rod and pegged so the tiers sit level.
This one is assembled that way, and the joints show a fine seam if you look closely — that is the construction, not a defect. Solid brass, with the base octagonal so it stands flat. The 26 cm version is the best balanced of the sizes.