Gadget - Lost in Time

Level                       Code
-----                       ----
Ancient Egypt	            2HHHJ37F2
Greece Golden Age	    37775D26
The Viking Invasion	    4HHHGC2BGF
Medieval England	    555513GJF
Feudal Japan	            6444726JG1
The Industrial Revolution   7FFFCGHJ4
The Roaring Twenties	    8666351F7
Moon Mission 1972	    9555F9C1
The Green Zone	            B777J2JBG5
Home Again	            C555HG491