Starting in the 1950s LEGO began individual parts sales, a practice that began with the Ferguson Tracktor in 1951. LEGO would supply dealers with wooden parts boxes and refill packs. These individual part sales would continue, at least in some markets, into the late 1950’s.
Supplemental consists of 68 sets that ran from 1955 to 1959. As of today,
214-4 Windows and Doors Retailer Pack is the most valuable Supplemental set with an estimated new/factory sealed value of $911.
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