Does it have the heat shield over the barrel? If so how many rows of holes does it have? 6 or 4?

What are the first 3 digits of the Serial number?? If the first of 6 digits is 8 or higher, its made during or after WWII. If its 6 or lower it was made during or before WWI.

With Heat Shield:
_________________________
The art of government is to make two-thirds of a nation pay all it possibly can pay for the benefit of the other third.--Voltaire