750-2 Hobby and Model Box was a Classic set released in 1962 based on Modulex. Included in this set was several sheets of graph paper custom made for LEGO bricks. That is because each grid on the paper corresponds exactly to 1x1 brick size. There was also a cardboard stock ruler that has 4 different scale measurements (2 per side). They are 1:25, 1:50, 1:100 and 1:200. They are used for measuring the scale of the building that is being built from the bricks. A booklet included lists some of the functions of the Architectural system used with these sets, and also shows the other Architectural sets available, as well as the spare parts packs that are part of this system.

Sets in Classic / Architecture

Theme / Subtheme Classic / Architecture
Year 1963
Availability Retired
751-2 LEGO Architecture Hobby and Model Box
Retail $18.50
Theme / Subtheme Classic / Architecture
Year 1963
Availability Retired
752 LEGO Architecture Hobby and Model Box
Retail $11.50