In 1973, LEGO released 3 Duplo Building Sets sets, all of these sets have been retired.
Largest 1973 LEGO Duplo Building Sets set
515-2 Building Set 31 pieces
Theme / Subtheme Duplo / Building Sets
Year 1973
Pieces 25
Availability Retired
020-2 LEGO Duplo Building Set
Theme / Subtheme Duplo / Building Sets
Year 1973
Pieces 29
Availability Retired
030-2 LEGO Duplo Building Set
Theme / Subtheme Duplo / Building Sets
Year 1973
Pieces 31
Availability Retired
515-2 LEGO Duplo Building Set