Danny,
The gauge on Cletrac or Oliver crawlers is the distance measured from the center of the rear track sprocket to the center of the opposing track sprocket. They came in 31&quot;, 42&quot; and 68&quot; standards with 68&quot; being most common, and 42&quot; least common. I have heard of a 60&quot; gauge, but that was probably for special applications. A 1945, or 1946 42&quot; or 68&quot; would have the serial number tag on the right frame rail behind the foot rest. Due to this location it is common for these to be missing, but if you clean the metal there should be 4 holes or broken rivets if the tag is missing. A 1945 could be the standard Cletrac Orange until about November when they changed to Oliver Green, and either color would have the narrow center strip on the grill. 1946 would be Oliver Green, possibly some of the earlier ones might have the narrow center strip, but once inventory was used, they changed to the wide center strip. I have seen a couple of the narrow strips on 1946 models, but there was no wide strips on 1945 models.