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Gilbert Erector Set Guidebook - acghs.org
www.acghs.org(for example, #5A came in a #6 sized box). Also included was another manual for the new set. This practice continued until 1919 when the accessory sets were dropped. Parts were T-clipped to cardboard inserts. Two styles of T-clips show up on sets from 1913 â 1919. One style is ½â across the top, is flat and resembles a âTâ. The other style