Your gun would have shipped in 1892; but to authenticate barrel length, grade, gauge, actual ship dates, etc.; you'd need to order a research letter, which information will only serve to add value to your gun. This gun appears to have survived in good condition based on the limited photos provided; and assuming those barrels remain in solid condition, RST manufactures 10 gauge shells with pressures suitable to shoot in this gun. I've tried them personally and they are excellent.