Unofficial LEGO Sets/Parts Collectors Guide - Found 20 years ago in a house in Billund... prototype Jumbo Bricks. These bricks were produced by TLG for Samsonite early on, and later for Europe/Australia
LEGO by Samsonite
LEGO 1960s Vintage OLD LOGO Bricks Samsonite 11 oz 2 x 4 Red lot parts pieces | eBay
Lego No. 375 Building Toy Vtg 1960s Bricks Set w/ Box Incomplete Samsonite | eBay