| LEGO → System → Service Packs |
35 Motor Case with Screws was a System Service Packs set released in 1977. It contained a black 1/3 12 x 4 x 3 upper housing of an electric 4.5 V train motor of type II (Part x469ba) and two ChromeSilver screws (Part bb06bd).
External links
http://www.toysperiod.com/lego-set-reference/service-packs/lego-35-motor-case-with-screws/