LEGO 4820 Princess' Palace Set Parts Inventory and Instructions - LEGO Reference Guide
Vtg LEGO Duplo GOLD CROWN from CASTLE PALACE Princess Prince Queen King # 4820 | eBay
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BrickLink - Part 6394pb03 : LEGO Duplo, Brick 2 x 4 x 2 with 2 x 2 Cutout on Bottom with Dressing Table Pattern (Sticker) - Set 4820 [DUPLO, Brick, Decorated] - BrickLink Reference Catalog
Lego to cut 1,400 staff as sales boom comes to an end