Karl, I've been looking at your pictures, and I think one difference is that on my gun, the color of the blued parts don't match the barrels as well as yours do.
The other is that the trigger gaurd looks like it was blued at the same time but with a different color than everything else. It doesn't really look like it's a matter of age since it's all pretty shiny and new appearing. Here are two pictures that might show the color difference a little better.
https://photos.app.goo.gl/ieboykDfG6B17hU58Nonetheless, I'm thinking I should probably just keep it as is for now. I suspect that what I've got is a very well done amateur refinish, and it likely does not warrant a re-do just to bring it up to professional standards.
