I own a S&W M&P Model of 1899 in .38 Special. Made right at the end before the Model of 1902 was introduced. But here is the fun part. It has four screws. So I guess that makes it a pre 5-Screw 4-Screw.
If you were being serious... that is a five screw. The fifth screw is the one in front of the trigger guard. Looking at the bottom of the gun, from the front. Five screws only have four screws on the side...