After a long absence Spaceflight Image Of The Week returns with this offering
A Boeing early eighties illustration by the late John "Jack" Olson http://www.398th.org/Images/Images_Association/Association/Text_Association/ClearingandColder/About%20Jack%20Olson.html depicting the servicing of a Space Tug (seemingly derived by the Centaur upper stage) inside its hangar onboard SOC (Space Operations Center) .....
A brightly coloured image .....
..... Part of a larger structure .....
..... FLIGHT International ..... 2 May 1981 .....
http://www.flightglobal.com/pdfarchive/view/1981/1981%20-%201253.html?search=Boeing%20Space%20Operations%20Center
"This image shows an artists impression of the Boeing Orbital Transfer vehicle concept, docked to a space station, from August 1984"