Welcome to the forum.
I noticed there are three common ways to 'promote' a pistol. The most common way is to refurbish it. The 2nd way is to engrave it. The 3rd way is to cut it away to make a arsenal classroom gun. The latter two ways are usually applied on mismatched pistols....the 3rd way is the coolest -- just cut the mismatched number out of the picture

Both engraving and cut away take lots of effort so they are usually not cheap when you buy them.
The grip panels are very unique.