Don't know how rare this is, but I found this serial number on a random brick in The End set : r/lego
LEGO Brick 1 x 2 x 2 with Number 5 Sticker with Inside Stud Holder (3245) | Brick Owl - LEGO Marketplace
Amazon.com: LEGO Parts and Pieces: Red (Bright Red) 1x8 Brick x10 : Toys & Games
Lego Brick Letters And Number SVG DXF PNG EPS Cut Files For Cricut & Silhouette | Instant Download
3d Isometric White Number One from Lego Brick on Red Background. 3d Number from Lego Bricks. Realistic Number Stock Vector - Illustration of construction, concept: 110672127
Tambov Russian Federation August 2020 Numbers 2021 Made Lego Bricks – Stock Editorial Photo © Rosinka79 #406531506
Creating number 8 from Lego Brick Stock Photo - Alamy
Build LEGO Numbers - Little Bins for Little Hands
How To Make Lego NUMBERS - 10664 Lego Bricks and More Creative Tower Tutorial - YouTube
LEGO Duplo Numbers Replacement Block Bricks Train 0 2 4 5 7 | eBay
Hands-On Place Value Math Activity with LEGO Bricks - Frugal Fun For Boys and Girls
Identifying LEGO® set and part numbers - Help Topics - Customer Service - LEGO.com US
LEGO Brick 2 x 6 with Numbers 2 and 3 Sticker (2456) | Brick Owl - LEGO Marketplace
Identifying LEGO® set and part numbers - Help Topics - Customer Service - LEGO.com US
LEGO Brick Labels v38 - BRICK ARCHITECT
ldd - LEGO Digital Designer Part Numbers - Bricks
Counting and Cardinality Using LEGO® Bricks—Student Edition -- Brick Math
LEGO Brick Labels - BRICK ARCHITECT
LEGO DUPLO Classic Brick Box Building Set with Storage 10913, Toy Car, Number Bricks and More, Learning Toys for Toddlers, Boys & Girls 18 Months Old - Walmart.com
1x6 Plate, Lego® Part Number 3666 Trans-Yellow – Atlanta Brick Co
BrickGun - Storage Labels
