Notice the difference between the shape of the broken toplever(serial number in the 5500 range) and the lever I pulled off (31000 range). Both are AE guns but that early one shows a lot more time was spent on finishing the gun.

The early gun is filed much nicer. The rib extension scallop is continued onto the lever and the lever is more delicate looking all over. Maybe it is not as strong but it makes for a more lovely appearance. Ross