This is the 1921 - 1922 US version of the Electrical Outfit. It appears that the only difference from the English Electrical Outfit No. 1 was the US version of the manual. This outfit cost $4.00. It contains wire (several types), small nuts and bolts (6 BA, for those who have bolt size references), insulated washers and bushings so the smaller bolts can be used in Meccano holes but are insulated, light bulbs and sockets, and parts for making electromagnets and other coils.