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Lego Mosasaurus Dinosaur Figure 6721 In Black & Gray, Dino Figure Only | eBay
Lego Dino Dinosaurs Mosasaurus 6721 Complete, No Instruction Manual, No Box | eBay
2001 Lego Dinosaurs - Mosasaurs Set Review - Lego Set 6721 (Part 3) - YouTube
LEGO 6721 Mosasaurus Set Parts Inventory and Instructions - LEGO Reference Guide