Better yet, look at the damned box it came in. It says 540J MOTOR on 5 of the 6 sides of the box and it has Tamiya or the Tamiya logo all over it. The lettering is blue. It's item #53689. The motor will be silver or matt silver in color and most of the time will have green and yellow motor leads. The end bell will be black and the can will have Johnson stamped on it.

No silvercan will be gold in color. The Tamiya #53689 is THE Silvercan motor that most racers refer to as a Silvercan.