I have the above marked .38 on the barrel but chambered for .38 sp. Serial No. is 462***. Beneath the serial Nos. on frame and crane are additional Nos. that appear to be: 8858 prefaced with the Maltese Cross stamp typically used by the factory ahead of the caliber designation on the barrel. Could this gun have been reworked from .38 to .38 sp by the factory? Has anyone seen similar markings?