In 1969, LEGO released 2 Duplo sets in the subtheme Basic Set, all of these sets have been retired.
Most valuable 1969 LEGO Duplo set
511 Building Set $347.57
Theme / Subtheme Duplo / Basic Set
Year 1969
Pieces 17
Availability Retired
510-3 LEGO Duplo Building Set
Value $159.88
Theme / Subtheme Duplo / Basic Set
Year 1969
Pieces 27
Availability Retired
511 LEGO Duplo Building Set
Retail $2.75
Value $347.57
Growth  12538.9%
Annual growth 9.2%