Many people look at the old Cellulose Acetate LEGO (1956-63 in Europe & Australia, 1961-70 in USA/Canada) as garbage, and worthy of a land fill.
But I think you might be surprised what it can be used for!! Especially the white bricks (which along with red, are the most common). My Dutch collector friend Henk, who collects old glued display models (and whom we fondly call the "glue sniffer") has been restoring very old LEGO display models, as well as rebuilding a few from scratch.
One of his most beautiful models has been a Greco-Roman temple building...
Here is another image...
This image shows all the warping of Cellulose Acetate white and red parts. This actually makes the old classic building look even more realistic... due to the fact that the deformities of the bricks appear like real aged stone.
New or used ABS bricks just cannot get this same effect... the lines are just too clean for a realistic look to classicial buildings.
So don't throw your old Cellulose Acetate parts away... save them for a possible building project...
Also... this classical model was from a 1958 continental European retailer glued display catalog, as shown here...
Also... for more information on old Cellulose Acetate and ABS plastic LEGO bricks... Chapter 60 - The LEGO Plastics Cellulose Acetate and ABS Plastic explains a lot of interesting information about Cellulose Acetate... can be seen here...
http://www.youblisher.com/p/626870-Chapter-60-The-LEGO-Plastics-Cellulose-Acetate-and-ABS/
From my Unofficial LEGO Sets/Parts Collectors Guide on DVD/download...
http://www.eurobricks.com/forum/index.php?showtopic=73780