LEGO Universal Building Set 722 Vintage 1980s Basic set series

LEGO Red Plate 6 x 12 (3028) Comes In

LEGO 722-1 Universal Building Set Set Parts Inventory and

722 Universal Building Set, Brickipedia

Appears to be mostly complete, though. See photos.

Vintage LEGO 722 Universal Building Set With Box And Manual / Instructions READ

2 x Lego 722 : Universal Building Set

LEGO 722 Universal Building Set

LEGO Red Plate 6 x 12 (3028) Comes In

Vintage Lego Universal Building Set 722 Never Opened Complete 1979

LEGO 722 Universal Building Set

LEGO Basic 1980