An A.C. Gilbert Master Builder Erector Set No. 12.5 with original case; image credit on full record.
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Mechanical Toy; AC Gilbert, Erector Set, No 12.5, Master Builder Walking Robot, Case.
An Erector "Master Builder" Set No. 12.5 with original case; Erector How to make 'em book included; "Builds the Mysterious WALKING ROBOT." Made... [more detail available via subscription]
