| LEGO → System → Automatic Binding Bricks | 
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700B Windows and Doors is an Automatic Binding Bricks spare parts set released in 1950. It contained 12 parts, 3 from each type of window/door (usually in 3 different colours, most often in white, yellow and dark blue). These parts were inserted into slotted bricks, were flat and had no studs. In 1953 the theme for this set changed from Automatic Binding Bricks to LEGO Mursten.
