Bidspirit auction | Detroit Diesel Allison MT 640

Detroit Diesel Allison MT 640 Advertising Paperweight - Marked MT 640, perhaps an engine model. About 1 3/4 H x 3 W x 2 1/2 D inches Condition: As pictured Dimensions: 1.75 x 3 x 2.5 in Weight: 0.66 lb