Many '17 Colts were issued to the USPO and kept in post offices for many decades. I don't believe they were USPO marked, but don't trust my memory on that. Most of them survived in very good shape. '17s often shoot cast bullets very well, but they need to be cast of hard alloy. Some of the original factory .45 Auto Rim ctgs. made specifically for these revolvers had lead bullets.

Like all New Services, these guns last forever if not abused.