Unofficial LEGO Sets/Parts Collectors Guide - LEGO sales started in early 1957 in Switzerland. Unlike other countries, in Switzerland they used canisters for selling LEGO basic sets. It is very likely that
LEGO Classic LEGO Bausteine - Starter Set 11002
LEGO Classic LEGO Bausteine - Starter Set 11002
Early LEGO in Central Europe - General LEGO Discussion - Eurobricks Forums
Building a Better Business Using... by Kristiansen, Per
Swiss canister sets from the 50s and 60s | Brickset
Aus alten Legosteinen werden neue Legosteine | Unternehmen