Meccano Erector Best of 50 605 pc Set Item #9550. Vintage Set to construct 50 different Moving models. Includes detailed assembly instruction booklet for all models. Requires AA batteries to run tool and motors for some of the models - NOT included. Opened box - Did not count each nut and screw in this set. Should have all parts. Many small parts, recommended age 8-13+ Shipping upgrade required. Clean and smoke free home. Hours of creativity for inspiring engineers or model designers!