Very nice and happy birthday. Model 28's with the 4" barrel and in good shape don't show up very often and when they do they are quite expensive. I was fortunate to acquire a pre 28(1956) from an old retired
police officer..complete duty rig for $350 about five years ago. You got a great deal..if one showed up here at the LGS it wouldn't last a day or two. Here's my pre 28.