Bricks & Minifigs in Anaheim never disappoints. I bought every prototype SW fig they had. All authentic lego, can someone provide the story behind these? : r/legostarwars
Red Lego prototype wheel brick - vintage and undrilled! | eBay
LEGO - Star Wars - 3x prototype satin Darth Vader monochrome minifigures red yellow neon orange - Catawiki
Prototype White Darth Vader Monochrome - Authentic Lego Minifigure – LFMinifigs
LEGO Star Wars: The (Mono)Clone Wars : r/legostarwars
Lego Prototype Red Hand Gorilla Fist Piece Misprint Error Rare as SDCC NYCC! | eBay
The LEGO® Minifigure at 40: development prototypes | New Elementary: LEGO® parts, sets and techniques