Bought this complete 8 3/8" Model 53 serial K44407x at auction recently for about the same aas you paid for yours, plus shipping. It is not unfired so I put 50 rounds downrange this week. Shoots like a laser. The people who built these guns were craftsmen.
P.S. Larry come to Colorado and you can shoot my 6" M53 with both cylinders, very accurate and great trigger.