With the M6GT done, the MOC factory has begun work on the Aston Martin DB4 GT Bertone Jet and the Jaguar XJ13. The BMW 503 and Porsche 550 RS Spyder are near
Basic Building Set : Set 503-1 | BrickLink
LEGO 503 Basic Building Set, 5+ | Brickset
LEGO City Wildlife Rescue Camp 60307 Building Toy for Kids Aged 6 and Up ( 503 Pieces) - Walmart.com
LEGO® Friends Dog Rescue Van Building Set 41729 | Radar Toys
Basic Building Set : Set 503-1 | BrickLink
LEGO® DUPLO® - LEGO® History - LEGO.com US
Basic Building Set : Set 503-1 | BrickLink
LEGO part 3008pb034 - Yellow Brick 1 x 8 with Coast Guard Logo on Triangle and C 503 Pattern at BrickScout
LEGO 503-1 Basic Building Set Set Parts Inventory and Instructions - LEGO Reference Guide
The LEGO Build-It Book, Vol. 1 | No Starch Press
LEGO 503 Basic Building Set | BrickEconomy
Ww2 Building House Ww2 Weapons Soldiers Vehicles Arme, Ww2 Military Ruins Moc Building Block, Compatible With Lego, 503 Pcs - Stacking Blocks - AliExpress
LEGO 503 Basic Building Set, 5+ Instructions, Basic